Create object for list in or out of while loop?
Code:
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My question is, is there any benefit to instantiating a new userDetails object in every loop, or can this be created outside the loop and title, forename and surname just written over with every pass of the loop?
In my controller I fetch a list of object 'object1' which has two fields field1 & field2.Now I have a model model1 which has two fields fieldsX & fieldY.fieldX = field1fieldY = dosomething(field2 also have a view model ViewModel1 which has a single fieldpublic List<model1> model2I need to send model2 to my view
View 4 RepliesI have a Google spreadsheet that I am reading data from and I want to load the data into a list object so I can use but I am having some issues.
Google Spreadsheet
-Worksheet name: Charts
-Tab: Color_Summarized
-Column 1: ColorSummary
-Column 2: ChildID
-Column 3: ParentID
sample rows:
Aqua|29|28
Blue|49|23
Yellow|55|28
My results are
Yellow Color_Summarized FH 55 28
How do I need to set it up so it keeps all the data loaded instead of just the last instance? Is there a better way then putting in class?
My code:
Code:
Imports Microsoft.VisualBasic
Imports System.Data
Imports System.Collections.Generic
Imports Google.GData.Spreadsheets
[code]....
I checking to see if we have any way to return all the keys to array without using the for each loop (there is no constraint for me to use for each loop i am just looking is there any other way)
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Isnt it possible to shorten this method? What i would like to know if its possible to just do something like
bestItem[enumerator.Key] = enumerator.Value.ToString();
I am using this
List<JobsMeta> JobsMeta= _db.JobsMetas.Where(m => m.int_OrganizationId == null || m.int_OrganizationId == OrganizationInfo.OrganizationId).OrderBy(m => m.int_SortId).ToList();
ViewData["JobMeta"] = JobsMeta;
now using the view i want to loop through ViewData["JobMeta"]
<% foreach (var JobsMeta in ViewData["JobMeta"]))
I am building a checkbox lists:
<asp:CheckBoxList ID="CheckBoxes" DataTextField="Value" DataValueField="Key" runat="server"></asp:CheckBoxList>
And trying to get the value's of the selected items:
List<Guid> things = new List<Guid>();
foreach (ListItem item in this.CheckBoxes.Items)
{
if (item.Selected)
things.Add(item.Value);
}
}
I get the errror
"The best overloaded method match for 'System.Collections.Generic.List.Add(System.Guid)' has some invalid arguments "
I have several rows in my database like this
ID Status Type Count Event
291 0 0 2 1
523 1 2 0 4
and so on. When my user performs some basic actions on my website, some values are passed through JSON to the server and are then converted into custom objects with 5 int properties(so they match the table). These objects that the server receives are the rows to be updated(based on ID) and the values for each column. How can I do this in one SQL statement without the need to loop through each object and update them all seperately? Is there a way? Preferably compatible with SQLServer 2005.
I have one Listbox and a List of data
I want to bind the list to listbox.
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I am getting error of in Foreach loop
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How to resolve this situation or any other alternative to cum out of this problem.
List<string> IDs = new List<string>();
XDocument doc = XDocument.Parse(xmlFile);
var query = from c in doc.Root.Elements("a").Elements("b")
select new { ID = c.Element("val").Value};
How can I convert query to List without loop foreach ?
I want to loop thru dropdown list and check the individual list item text using C#, let me know what is the best way to do this?
View 4 RepliesI am trying to assign values I've gathered from a JSON feed to my own type, a class in which I have defined certain fields (properties) to put the JSON elements into, plus elements that are derived from a RegEx pattern matching process. This will then allow me to access the object using LINQ, as I am using a List to hold my objects. There is a foreach loop in my code that loops for each match that my RegEx method finds. I am only interested in the parts of the JSON feed where there is a match. So my own defined class is as such:
//simple field definition class
public class TwitterCollection
{
public string origURL { get; set; }
public string txtDesc { get; set; }
public string imgURL { get; set; }
public string userName { get; set; }
public string createdAt { get; set; }
}
And then I want to populate List in the RegEx Matches loop:
foreach (Match match in matches)
{
GroupCollection groups = match.Groups;
var tc = new List<TwitterCollection>()
{
origURL = groups[0].Value.ToString(),
txtDesc = res.text,
imgUrl = res.profile_image_url,
userName = res.from_user_id,
createdAt = res.created_at,
};
}
The code will then go on to extract and sort the results via Linq to Objects. But compiler won't actually let me create my var tc = new List<TwitterCollection>() because: 'System.Collections.Generic.List' does not contain a definition for 'origURL' ... even though I have defined it. It does not flag an error if I simply write new TwitterCollection but then how do I refer to this in my Linq expression later on??
I have dropdown list I want to use the arror to click and control and select the value in the dropdown box , the first click select item1 .... How can I do that?
View 4 RepliesI want to loop through my datatable column called SDESCR and created a string that looks like this.
Dim labels As String() = {"North", "South", "East", "West", "Up", "Down"}
this is what i am trying and it is not working
Dim labels As String()
For Each row As DataRow In tablegraph.Rows
labels = labels " ' " + row.Item("SDESCR") + " ',"
Next row
I've got a while loop that's doing some stuff, and what I want is for it to create a new array each time.
while(condition){
//do some stuff
//create an array x[]
//amend values in array
//save as new array each time until loop finished
}
Actually i need to store the comma separated values of different datatypes in an array using split.And then i hav to sort these values comparing zeroth position element of all rows.
I used Object Test Bench to test my classes in VS 2008 professional edition . Right click on Class name and then selected create instance ,then its Constructor, there comes a dialog box, that just gives a message and a TextBox field is present there, i filled that field with any name and clicked OK.Then error message comes that "Create Instance Failed" and its error code is "0x80004005" . What's this ? How to instantiate object of my classes ?
View 4 RepliesHow can I make the following code shorter and more efficient.
I want to loop through the check box list for all true values.
I want to get the check list item and complare with database value then check the box.
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i have list of user class but now i have to return it as a list of object, i try to convert it but it gives me error like. can not implicitly convert.
View 4 RepliesI am currently working on a project where I am trying pull a list of entries from an Oracle database depending on a selection that is made by the user via a Drop Down list. Then I want provide a user with a list of options that they can select that is related to the drop down option that they have selected. For Example:
First Drop Down from database: Honda, BMW, Ford
If user selects:
Honda -- options that are available in the separte table in the database for this entry are -- Type, Engine Size, Colour
BMW -- options that are available in the separte table in the database for this entry are -- Colour, Wheel Trims, Extra's
Ford -- options that are available in the separte table in the database for this entry are -- Extra's
What I wanted to do is have a form displayed to the user where thy can say select a car eg. "BMW" and then on the change of that drop downs index the site will do a call back and retrieve the entries for the BMW options in the seperate tabel, these being Colour, Wheel Trims, Extra's. Then it will put these details in a DataSet and then i wanted to create a new text box or input field for the users to enter details in. I have tried the below code with no success as I get an error on my for loop of looking through the options DataSet.
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I am declaring a list in my class, populating the list in page load and using the list in various methods in this class. But, I get this error at every instance where I use this list in the methods. Error: System.NullReferenceException: Object reference not set to an instance of an object.
public partial class ViewBG1 : HealthServicePage
I have a dropdownlist whose values are int (actually they are string basically but they can be parsed. they are 1, 2, 3, 4, 5.. etc)
I want to create textboxes acording to the number of dropdownlist selected value. Lets say drop down shows 3 and I wanna create 3 textboxes. how can I do that.
OK I'm a total noob so bear waith me. I'm using the pubs database. I want to add several gridviews to my page in the inside of a for loop. Here is my code so far:
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In the foreach loop, it is iterating through the publisher's tables rows, and I wamt it to query the titles table to find all books that have that publisher id and create a gridview out of it. In the code above I am not getting it right. I need multiple GridViews, one for each iteration of the foreach loop. How do I do this?
1 My DataTable Return following Data
Acct Books Annual
Acct Books Monthly
Acct Tax Income Tax
Admin GH Eqpt
Admin Offc Eqpt
Admin Offc Misc
Admin Offc Eqpt
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i when i m set some value in data object. and create new object in form then new object contain previus value in it.
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