MVC 2 - Using LINQ And Sending A Linq Object To The View And Trying To Show It In A Textbox

Mar 11, 2011

I am using LINQ and sending a linq object to the view and trying to show it in a textbox like this

<%=Html.TextBox("petname",Model.PetName) %>

But I am getting error, how can I show (PetRecord.PetName) which is my linq entity

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MVC :: Sending Information To View - Linq Query?

Jun 27, 2010

In view im trying to do following code:

[Code]....

Trought controller I am trying to send:

[Code]....


Is this Possible? I cannot send it trought model becouse I am sending a list of Products which have a Type field. I don't know how to show in the List view Instead of Type id a Type name instead

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How To Use Linq To Object To Hide Or Show Some Control In Page

Aug 11, 2010

I am creating a function to hide all the gridview controls except the control whose name is being passed in the function.

Here this.Controls referes to controls present in the page (At compilation error is thrown although). I want to fetch all the controls of type GridView with Name property not equal to the one passed in the funtion.

Now after getting a collection of GridView. I want to hide all the grids

private void HideGridView(string gridToShow)
{
GridView[] result = from control in this.Controls
where control.GetType() == typeof(GridView) && control.Name !=gridToShow
select control as GridView;
foreach (var control in result)
control.Visible = false;
}

At comile time it shows me this.Control as invalid because it is not a collection.

How can I achieve this on a web application

EDIT:

private void HideGridView(string gridToShow)
{
(from control in this.Controls.OfType<GridView>
where control.Name !=gridToShow
select control).ToList().ForEach(gv=>gv.Visible=false);
}

Here is the code I wrote, shows me an error: GridView is a type but used like a variable (Compile time error).
And at where Invalid Expression Term 'where'

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DataSource Controls :: Linq To SQL Set Linq Object Propertychanged?

Mar 12, 2010

I am writing a plugin to help with a current ERP system we have that I am not allowed to modify the data structure at all. The table I am dealing with has over 100 columns and I am wanting to set my linq object propertychanged event and submitchanges or do I really have list out each property and set it equal to the new one?Below is an example of what I am trying to do:

[Code]....

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DataSource Controls :: LINQ To DataSet And LINQ To Object

Mar 9, 2010

txtLastName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Last_Name.ToString();

Like that I have large number of controls on my form. I have dought, if I assigned like this, db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Last_Name.ToString(); to every control, then I have set of controls like,

ddlSalutation.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Salutation.ToString();
txtLastName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Last_Name.ToString();
txtFirstName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).First_Name.ToString();
txtMI.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Middle_Initial.ToString();
txtAddress.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Home_Address.ToString();
txtCity.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).City.ToString();
ddlState.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).State.ToString();
txtZip.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Zip_Code.ToString();
txtSSNo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ssn.ToString();
txtMRNo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Mr_No.ToString();
txtDOB.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Birth_Date.ToString();
RBGender.SelectedItem.Value = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Gender.ToString();
RBMaritalStatus.SelectedItem.Value = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Marital_Status.ToString();
txtHomePhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Home_Phone.ToString();
txtWorkPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).WorkPhone.ToString();
txtCellPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).CellPhone.ToString();
ddlSuffix.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Suffix.ToString();
txtReligion.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Religion.ToString();
txtEmail.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Email.ToString();
txtSSOName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ssn.ToString();
txtPatientKin.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Patient_Kin.ToString();
txtRelationWithPatient.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Kin_Relation.ToString();
txtPhoneNo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Kin_Phone.ToString();
ddlPreferredPharmacy.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Id_Pharmacy.ToString();
txtEmergencyContactName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Emergency_Contact_Name.ToString();
txtEmergencyContactNumber.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Emergency_Contact_Phone.ToString();
txtRelation.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Kin_Relation.ToString();
txtRace.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Race.ToString();
ddlHowDidPatientFindUs.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).How_Found.ToString();
txtEmployerName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_Name.ToString();
txtEmployerOccupation.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_Occupation.ToString();
txtEmployerPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_Cell_Phone.ToString();
txtEmployerAddress.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_Address.ToString();
txtEmployerCity.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_City.ToString();
ddlEmployerState.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_State.ToString();
txtEmployerZip.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Employer_Zip.ToString();
txtRecordsReleasedTo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Records_Released_To.ToString();
txtOtherInfo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Other_Info.ToString();
txtPopupNote.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Popup_e.ToString();
ddlPPlanName.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Insurance_Name.ToString();
txtPGroupNo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Group_No.ToString();
txtPIDNo.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Id_No.ToString();
txtPPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Plan_Phone.ToString();
txtPVerifiedWith.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Verified_With.ToString();
txtPVerifiedPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Verified_Phone.ToString();
txtPEffectiveDate.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Effective_Date.ToString();
txtPExtDate.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Ext_Date.ToString();
if (db.usp_ATI_FetchPatientDetails(iPatientID).Count() > 0)
{
txtPGLastName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_Name.ToString();
txtPGFirstName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_Name.ToString();
txtPGMI.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_MI.ToString();
txtPGBirthGDate.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_Dob.ToString();
txtPGAddress.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_Address.ToString();
txtPGCity.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_City.ToString();
ddlPGState.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_State.ToString();
txtPGZip.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_Zip.ToString();
txtPGEmployerFirstName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_Fname.ToString();
txtPGEmployerLastName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_Lname.ToString();
txtPGEmployerPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_Phone.ToString();
txtPGEmployerOccupation.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_Occupation.ToString();
txtPGEmployerAddress.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_Address.ToString();
txtPGEmployerCity.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_City.ToString();
ddlPGState.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_State.ToString();
txtPGEmployerZip.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Grn_Emp_Zip.ToString();
ddlPGPatientRelationshipToGuarantor.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Grn_Rel_With_Pat.ToString();
txtPGOtherInsuranceNotes.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Other_Notes.ToString();
txtPGAuthorization.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_Authorization.ToString();
txtPGAob.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(0).Ins_AOB.ToString();
}
if (db.usp_ATI_FetchPatientDetails(iPatientID).Count() > 1)
{
txtSGLastName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_Name.ToString();
txtSGFirstName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_Name.ToString();
txtSGMI.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_MI.ToString();
txtSGBirthGDate.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_Dob.ToString();
txtSGAddress.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_Address.ToString();
txtSGCity.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_City.ToString();
ddlSGState.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_State.ToString();
txtSGZip.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_Zip.ToString();
txtSGEmployerFirstName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_Fname.ToString();
txtSGEmployerLastName.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_Lname.ToString();
txtSGEmployerPhone.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_Phone.ToString();
txtSGEmployerOccupation.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_Occupation.ToString();
txtSGEmployerAddress.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_Address.ToString();
txtSGEmployerCity.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_City.ToString();
ddlSGState.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_State.ToString();
txtSGEmployerZip.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Grn_Emp_Zip.ToString();
ddlSGPatientRelationshipToGuarantor.SelectedItem.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Grn_Rel_With_Pat.ToString();
txtSGOtherInsuranceNotes.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Other_Notes.ToString();
txtSGAuthorization.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_Authorization.ToString();
txtSGAob.Text = db.usp_ATI_FetchPatientDetails(iPatientID).ElementAt(1).Ins_AOB.ToString();
}

My question is that, for each control the Stored Procedure called or not? If it is yes then it is time consuming and I need to use LINQ to DataSet or LINQ to Object rather than to call SP for each control. What is difference between LINQ to DataSet and LINQ to Object?

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Linq To Xml Datasource For Grid View Is Not Working - The Grid Show No Rows

Jun 30, 2010

I'm getting some Xml back from a service. I would like it to be the datasource of a grid view on my aspx page. Here is a sample of the Xml

<?xml version="1.0" encoding="utf-16" ?>
<ArrayOfTripTollCompleteDC xmlns:xsi=[URL]"
xmlns:xsd=[URL]>
<TripTollCompleteDC>
<TripTollId>5</TripTollId>
<DMSLaneModeID xsi:nil="true" />
<HOVOnly>false</HOVOnly>
<CreateDateTime>2010-06-07T15:54:01.023</CreateDateTime>
<ConfigVTMSDelaySeconds>5</ConfigVTMSDelaySeconds>
</TripTollCompleteDC>

and here is my code that parses the xml and tries to bind the grid. What am I missing here?

var retVal = service.GetTripDetailsByTripID(tripId);
var xmlTrips = XDocument.Parse(retVal);
var tripTolls =
from t in xmlTrips.Elements("TripTollCompleteDC")
select new {
TripTollId = (int)t.Element("TripTollId")
, DMSLaneModeID = (int?)t.Element("DMSLaneModeID")
, HOVOnly = (bool)t.Element("HOVOnly")
, CreateDateTime = (DateTime)t.Element("CreateDateTime")
, ConfigVTMSDelaySeconds = (int)t.Element("ConfigVTMSDelaySeconds")
};
grdTripDetails.DataSource = tripTolls;
grdTripDetails.DataBind();

I realize these are anonymous types. Is that a problem? I have verified the service is returning the Xml as stated above. Can anyone out there point me in the right direction? Just for completeness, here is the grid markup <asp:GridView runat="server" ID="grdTripDetails" />

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Can Handle Null Value In Linq / Object Reference Not Set To An Instance Of An Object

May 10, 2010

[code]....

this code give that solution.but if any one of the field have null(example:r.urrQuickLinkRights contain the NULL) then only it will throw error like Object reference not set to an instance of an object.

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C# - Linq To SQL Where In Clause Causes Object Not Set To Instance Of Object

Jul 1, 2010

I have two tables, subscriptions and topics. Each subscription is related to a specific TopicID (PK for topics table). The first query works fine and retrieves the topicID's of all videos that were uploaded today. The problem occurs when I try and then use the results of query1 as a where-in clause for query 2. I keep receiving object reference not set to instance of an object.

Query 1 IQueryable<int> topics = (from t in dataLayer.Videos
where SqlMethods.DateDiffDay(t.DateCreated, DateTime.Today) == 0
select t.TopicID).Distinct(); [code]....

I have looked at some samples around the net and they all seem to be identical to mine.

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ADO.NET :: Add An Object To Table With Linq To Sql?

Dec 25, 2010

i want add a record to my table(News) in the database School.

so i create a class for news table look like this:

public class News
{
private int _newsid;
private string _datetoshow;
private string _title;
private string _description;
private string _writtenby;
public int NewsID
{
get { return this._newsid; }
set { this._newsid = value; }
}
public string DateToShow.......

pop up is:

'system.Data.Linq.Table <New>' does not contain a definition for add and no extension method 'Add' accepting a first argument of type 'System.Data.linq.Table<New>' could be found (are you missing directive or an assembly reference?)

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C# - Set A Value On A Linq Object During The Query?

Feb 16, 2010

I have a simple query i.e.

var trips = from t in ctx.Trips
select t;

The problem is that I have an extra property on the Trip object that needs to be assigned, preferably without iterating through the returned IQueryable.

Does anyone know how to set the value during the query? (i.e. select t, t.property = "value")

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ADO.NET :: Clone Object In Linq To Sql?

Oct 21, 2010

I have two tables in the dbml, Table1 and Table2. Table1 has a Table1ID as primary key and Table2 has Table1ID as foreign key.I have an instance of Table1 called table1,

[Code]....

then I create another instance of Table1 called anotherTable1,

[Code]....

At this point, my intention is to have table1 containing a list of Table2 and anotherTable1 containing 0 Table2. However, both table1.Table2 and anotherTable1.Table2 become 0 count.

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ADO.NET :: Linq And Webservices / Create A Webservice Method Using LINQ Technology And To Populate A Dropdown In a Form?

Oct 6, 2010

I am struggling to create a webservice method using LINQ technology and to populate a dropdown in a form. Here is the Webservice code.

[WebMethod]

public
string[] GetAllCountries()
{
LinqClassesDataContext db =
new
LinqClassesDataContext();
var q =
from c
in db.ListContinents()select
c;
return q.ToList() ;
}

And here is the form code behind

protectedvoid
Page_Load(object sender,
EventArgs e)
{
WSClass WS =
new
WSClass();//bool
ds = WS.GetAllCountries();
var v = WS.GetAllCountries();
ddlContinent.DataSource = v;
ddlContinent.DataBind();
}

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ADO.NET :: Retriving Data From View . Linq To View C#

Mar 10, 2011

Hi to All,



I would like to ask for advice how can i load the data and the columns from MSSQL View to my app by View name.

Let say i have one methode/class that gets the view name and returns back the data (List<Object>).

And in the xml mapping i can set the relation between the object and the columns in the view.



Any advice will be appriciated.



Thank you



Ori







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C# - Orderby A HashSet In An Object In Linq?

Jan 7, 2010

I have a pretty complex Linq statement with multiple joins, but am having a problem with an orderby statement.

I think I can reduce the question down a bit, but will expand if needed.

First my object has the following properties:

myObject.ID This is a basic Int

myObject.BrandName This is my HashSet<string>.

I need to sort my Object by the BrandName using the lowest or highest value depending on if I am sorting ascending or descending.

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Sep 14, 2010

I've build a linq query.But i want a random selection so its not always ID : 1,2,3,4,5,6 How can i randomize this var? I like to bind it to a repeater.//TagCloud:

Random rand = new Random();
var tc1 = from i in JumpTide.cms.menu.GetMenuItems(32)
select new

[code]...

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DataSource Controls :: Save Object With Linq?

Feb 5, 2010

I have a table into the database. Table name is NewResults. I have created instance of NewResult called result and fill it with all the infos i need. Now when I try to add i dont have add method in

context.NewResults. -> no Add here. So if i enter context.NewResults.Add(result) error as below is shown:

Error 1 'System.Data.Linq.Table<UDWAutoLinqTry.LinqToSql.NewResult>' does not contain a definition for 'Add' and no extension method 'Add' accepting a first argument of type 'System.Data.Linq.Table<UDWAutoLinqTry.LinqToSql.NewResult>' could be found
(are you missing a using directive or an assembly reference?) C:Documents and SettingsAlek.NikolovskiMy DocumentsVisual Studio 2008ProjectsUDWAutoLinqTryUDWAutoLinqTryCompareCompareHelper.cs 332 32 UDWAutoLinqTry

what am i missing?

I know that i dont have to create add method myself i was googling and i am doing everything as it should but still no luck?

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ADO.NET :: Update Value Directly In Class Object Using Linq?

Sep 30, 2010

I have a class object which is basically kind of hierarchy and looks like this when I convert that to XML.

[Code]....

So you can see that I have "objectComponent" which is kind of hierarchy and that hierarchy can be upto any level.

Now I need to update <quantity> value where <sku> = "SKU 2", remember this <sku> can be anywhere in hierarchy, so I need to update its <quantity> value where <sku> = "SKU 2".

So my question is how can I update that value using Linq query and specifically, I need that value to be updated in the actual object itself because I need to pass that updated object for furthur process.

In my c# code, there is only one class named "ObjectComponent" and that has all of these properties and "objectBundle" as array and the whole hierarchy starts from there.

how can I update value in this object directly?

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C# - Return Linq Query Into Single Object?

Mar 16, 2011

I have this code in my controller:

public ActionResult Details(int id)
{
using (var db = new MatchGamingEntities())

[code]...

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Insert Record In Xml File In Object Oriented Way By Linq To Xml In C#?

Feb 26, 2011

I have XML file template as:

<Students>
<Student>
<StudentID></StudentID>
<Name></Name>
<Address></Address>
<EmailId></EmailId>
<StudentMobile></StudentMobile>
<ParentName></ParentName>
<ParentMobile></ParentMobile>
<Physics></Physics>
<Chemistry></Chemistry>
<Mathematics></Mathematics>
<Biology></Biology>
<RegistrationDate></RegistrationDate>
</Student>
</Students>

in my asp.net application. I want to insert the student registration entry through my web form. but want to use proper object oriented method. like by create the object as "Student" it will have required property. and want to insert new node with incremental (auto increment) Student ID. I am using c#. how can i achieve this? will Linq is best way to do this?

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C# - Modifying Properties In Object With LINQ And Functions Lamba?

Mar 31, 2010

I know how to deploy and retrieve a single element in LINQ, but how can I do to change all the properties in a list. In the line below, I can only modify a record, I would modify several.

_ListaAcaoMenuInfo.Where(p => p.Id_acao == id).FirstOrDefault().Id_menu = 0;

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ADO.NET :: Simple Databinding With LINQ Causing Object Reference Not Set?

Aug 15, 2010

I have a user control with a datalist. I just want to do some simple binding but keep getting an object reference not set to an instance of an object error. The following is the code, I am sure I am just missing something simple:

Dim dc As Forms.DataClassesDataContext = New Forms.DataClassesDataContext
Dim formQuery = From fq In dc.v_form_questions _
Where fq.FormTypeID = FormTypeID _

[code]...

When I debug, I see values for the formQuery; I am also able to loop through the formQuery and response.write a field out, however every time I try to bind it to a databound control, I get the Object reference not set to an instance of an object error.I initally was using a simple LinqDataSource object, but needed to set the where parameter to the FormTypeID property of this usercontrol. I had a Where condition defined on Page Init, but started getting the object reference error.

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DataSource Controls :: Linq Object To GridView With Formatting?

Jan 21, 2010

I want to display a Gridview of Patients before I submit them to the database. Is there a way(better way), other then List<Patients>, to bind a list to a GridView.

I am using Linq to SQL and I have a DAL with the Patients table inside. I create a new list of Patients

[Code]....

Now the problem is I can't use a Linqdatasource or Objectdatasource to link to the GridView as no data is in the db yet. The only thing that works is GridView.DataSource = _patients; but I lose all automatic formatting and as far as I can tell it is going to be a pain to format manually. It would seem I should be able to somehow link my object _patients to an one of the datasourses so I would have formatting and all.

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Avoid Loading A LINQ To SQL Object Twice When Editing It On A Website

Apr 9, 2010

I know you are all tired of this Linq-to-Sql questions, but I'm barely starting to use it (never used an ORM before) and I've already find some "ugly" things. I'm pretty used to ASP.NET Webforms old school developing, but I want to leave that behind and learn the new stuff (I've just started to read a ASP.NET MVC book and a .NET 3.5/4.0 one). So here's is one thing I didn't like and I couldn't find a good alternative to it.

In most examples of editing a LINQ object I've seen the object is loaded (hitting the db) at first to fill the current values on the form page. Then, the user modify some fields and when the "Save" button is clicked, the object is loaded for second time and then updated. Here's a simplified example of ScottGu NerdDinner site.

//
// GET: /Dinners/Edit/5
[Authorize]
public ActionResult Edit(int id) {
Dinner dinner = dinnerRepository.GetDinner(id);
return View(new DinnerFormViewModel(dinner));
}
//
// POST: /Dinners/Edit/5
[AcceptVerbs(HttpVerbs.Post), Authorize]
public ActionResult Edit(int id, FormCollection collection) {
Dinner dinner = dinnerRepository.GetDinner(id);
UpdateModel(dinner);
dinnerRepository.Save();
return RedirectToAction("Details", new { id=dinner.DinnerID });
}

As you can see the dinner object is loaded two times for every modification. Unless I'm missing something about LINQ to SQL caching the last queried objects or something like that I don't like getting it twice when it should be retrieved only one time, modified and then comitted back to the database. So again, am I really missing something? Or is it really hitting the database twice (in the example above it won't harm, but there could be cases that getting an object or set of objects could be heavy stuff).

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Dynamic Where Condition In Linq To Sql Or Linq To Entity?

Dec 24, 2010

We would like to perform something like this

string strCondition = "FirstName=='abc'"
from p in People.Where(strCondition) select p

In our architecture we are usign both Linq-Sql as well Linq-Entity. So please give some thoughts wehter it is possible or not and is there any way to perform this?

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C# - Print A One To Many Linq Query To A View?

Mar 18, 2011

I currently have this as my controller:

public ActionResult Index()
{
MembershipUser currentUser = Membership.GetUser();
Guid UserId = (Guid)currentUser.ProviderUserKey;
using (var db = new MatchGamingEntities())
{............

Currently my table "BankTransactions" could have multiple records in there with the same Account Id, so when I run this querry I get a more than one bank transaction related to a given accountid. I want to be able to print this into a view, but I am not sure how my var MyAccount is returning given that there are multiple BankTransactions. How would I transfer this model into the view and be able to iterate through all the bank transactions associated with an AccountId

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