I M New to Linq, I M Searching articles using
DBSearchDataContext db = new DBSearchDataContext();
object q = from b in db.Articles
where b.Tags.Contains(val) |
b.NewsTitle.Contains(val) |
b.EnglishContent.Contains(val)
select b;
I cannot exclude results where category = video or photos. H to exclude category where value is "videos" or "Photographs"
I am using dynamic data entities linq to sql project. For my test project I have one table, with 10 columns and a single primary key for example. Almost all the columns are varchars.I can get the basic project up and running fine - update, delete, insert etc.ince it has no foreign keys, there are no search filters rendered. I was wondering if there was an easy way to generate a set of filters for the columns for this table. So a First name and last name search box. Is there a way to generate these filters for chosen columns and is there a way to generate these for all the columns
for example, above each of the columns in the grid there might be a text box ( I am not too fussed where the text boxes are rendered as such). Each of the text boxes will act as a filter for that column (doing a SQL 'like')
I tried to filter the data table and order by the records based on ID.
Ny filter string will looks like this.
sFilter= "ORDER BY Column1"
when i tried this, i got the following error."Missing operand after 'ORDER' operator."
I have a standard gridview, with the standard paging and sorting interface enabled.The application holds appointments for three organisational units, with a maximum of 3000 appointment records being returned across all three units. The appointment records are quite small.
The choice I am faced with is to:
1. Have an Org Unit dropdown which returns to the datasource on change of selection and at inital databind, and returns appointment records for one org unit at a time i.e. approx 1000 records.
2. Have the objectdatasource return all 3000 appointment records for all org units at initial databind, and filter the objectdatasource by org unit on change of selection, thereby saving a trip to the datasource.
I guess the question boils down to identifying the point at which querying the datasource by org unit is more efficient than filtering the records returned by org unit.
Is 3000 records a lot for a gridview to be paging and sorting etc.
I have two data tables and I need to compare the dataRows and insert all the unequals into a table. See the codes below. Goal: if the checkbox is true I loop through the ItemData table and store that data into x.Data. Next I look for all records that has row("ItemRandomize") = True and finally I add those records to xData table. There is an if statement in my for loop that checks for duplicate records -- This is were the application fails. How to compare both tables and store the unmatched rows.
[Code]....
I have 2 tables t1 and t2. In t1 I have 4 columns from that I want to insert only 2 columns to another table t2. I only want to send data which is in the form of IP address like (123.123.123.123). After eliminating nulls and other data.
View 7 RepliesI want to make a filtering table. It will be a table where below each column it will have a textbox. I want to, while the person type a word in the filter textbox, the table refresh, displaying only the items (rows) with that word. I think AJAX is a good idea. Just put the table and the textbox in a UpdatePanel, and then write a code to refresh the table on textbox_changetext event. The problem is that you have to take the cursor out of textbox to have the event fired, and I want the table update while text typing.
View 4 RepliesI am using this code to fill my datalist:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim myConnection As SqlConnection Dim myCommand As SqlDataAdapter
myConnection = New SqlConnection("mydb")
myCommand = New SqlDataAdapter("SELECT * FROM Posts", myConnection)
Dim ds As DataSet = New DataSet() myCommand.Fill(ds)
DataList1.DataSource = ds DataList1.DataBind()
End Sub
It works and fills the datalist with the whole table. When this page opens the address bar is like [URL].Ii would like the datalist to show all contents in the table with this specific thread ID.
I save dates as a string in a varchar data field named "TilDato" in a SQLServer-express table. I want to filter the records smaller than a specific date from a variable in the script. I try the following statement, but it does not seems function logically.
objCmd = new
SqlCommand("SELECT * FROM Reservering WHERE @laanedato<=TilDato",myConn2);
objCmd.Parameters.Add("@laanedato", laanedato);
objRdr = objCmd.ExecuteReader();
i am choosing a category from a DropDownList controll, and if want to add a new category at the same time i have a TextBoks for it, i have create a Model, BLL and DAL classes, my problem is:
in the DAL class i want to add a new row to Question, but i need to check first if the object.category exsist in the table Category, if it does i want to get the Cid for it if it dosen't exist i want to create a new raw then get the Cid, this is my code:
public string add(Faq inFaq)
{
using (var db = new DBClassDataContext())
{
try
{
var se = from Category in db.Categorys
where Category.category == inFaq.category
select Category.Cid;
if (se.Count() == 0 ).........
I have two Data Table, One data table contain Product-A information, and another data table contain Product-B Information, I want to get the uncommon values between the two data table, I would like to achieve this using LINQ, find the sample values below
Product Data Table
Product-A-Id ProductName
W10012 A
W10013 B
W10014 C
W10015 D
Sales Data Table
ProductId ProductName
W10013 B
W10013 B
W10015 D
X10020 AC
I want to find the uncommon data from both data table using LINQ, So find my expected Data Table result is
Result Data Table
ProductId ProductName
W10012 A
W10014 C
X10020 AC
i want to use a function to get all the fields from a LINQ table as ill be using this table alot i thought putting it in a function would be quicker
how can i get all the fields and all the field data from linq table and use it in a function
for example
var address1 = FunctionName.Address1
var postcode = functioname.postcode
or however i can make this work
[Code]....
how can i select a record from A table and insert into B table using linq?
View 2 RepliesIs there a way to do the following in VB:dim sTableClass as string = <my underlying table class in linq>dim dbTab as system.data.linq.table(<typed class of sTableClass>)I've tried cycling through the table objects of the linq data context and retrieved the following: Dim ddData = pkDB.GetTable(tt.RowType.Type.UnderlyingSystemType)(where tt reflects the row of the table I want to retrieve) But the expression returns and itable and I need the table equivalent but can't get this to work with a stri
View 1 RepliesMmy data table has four columns. How can I get only selected columns name?
View 5 RepliesI have to find the best way to do this using LINQ. I need to summarize an amount in a iTransaction table by
Account (e.g. 12345) and add that amount to an same Account ( e.g12345) if it exists in a iAccount table . Here is the code which syntax checks ok and tested ok up to the .submitChanges statement (i.e. I stopped and didn't allow the submit.
Following is the LINQ code. (1) Is that a good way to do this. OR should I try the INTERCEPT.
(2) How is the best way to insert a new record/row in the iAccounts table if it DOES NOT exist in the iAccount Table.
[Code]....
I have placed a textbox, dropdownlist and command button in a section of my master page. The textbox, named txtsearch, will be used to input a search string. The dropdownlist, named ddlsearch, will be used to specify in which field to search in the table, either part name or NSN.
Questions:
What VB code do I use to save the value entered into txtsearch as a search string? How do I pass that value to my entitydatasource? How do I tell entitydatasource to search in either the part name or NSN field based on the value of ddlsearch?
I have a question about linq delete.
I have 2 table in database and they are joined.
First Table: UserID, UserName, UserSurname, UserPhone, CompanyId
Second Table: CompanyId, CompanyName
First Table I have many recods with related second table.
I want to delete one company in second record, But firtly I have to delete users (more than 1)
How can I delete it with using linq?
i have i page where i use autocomplete jquery plugin. this might filter from database. but i do not want to make request to DB. so i have write it to session object as List. and every time i am filtering data from this session. what i am doing wrong or have there any other way to do it?
View 1 Repliesi 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?)
i use Default membership provider for my membership
i add a profile table for some more information from user and it related with UserId with aspnet_Users
to get data from my database i use Entity Data Model
now i want to write a Linq to get data from all 3 tables
In my application i want to compare data of two users from database table using linq.
lets say i have ten columns in UserMaster table.
Now based on the comparision i want to display result.
Like is 10 out of 10 columns matches for those two users result will be 100,if 9 columns matches then result will be 90 and if 0 matches thn result will be 0.
i dont want to write if else for somany time.
I am new to linq.
Tables:
WORKORDER and CUSTFIELD
Fields:
WORKORDER = WORKORDERID
CUSTFIELD = WORKORDERID, CUSTFIELDNAME, CUSTFIELDVALUE
There are multiple different type of name/value pairs. I want to specifically return the custfield value where custfield name is "INCIDENT", and the custfield value where custfield name is "NETWORK" all for the appropriate WORKORDERID
I've tried a few different ways and just can't grasp how the linq is supposed to go to get the results I want. I can get an incident value, or network value, but not both.
I have the proper association set up in the dbml so both of these work to get the single value:
var b = from i in edcwdv.WOCUSTFIELDs join p in edcwdv.WORKORDERs on i.WORKORDERID equalsp.WORKORDERID where i.CUSTFIELDNAME.Contains("INCIDENT") select new { i.CUSTFIELDNAME, i.CUSTFIELDVALUE, p.WORKORDERID };
var incident = from wo in edcwdv.WORKORDERs orderby wo.WORKORDERID where wo.WOCUSTFIELDs.CUSTFIELDNAME.Contains("INCIDENT") select new { wo.WORKORDERID, wo.WOCUSTFIELDs.CUSTFIELDVALUE}; So essentially i want to pull the value for each of the fields, INCIDENT and NETWORK
Using Visual Studio I've created a DBML file, and added a table to it from a local database. This created a data context called UserDataContext. In my ASPX page I can create an instance of the data context using:
UserDataContext db1 = new UserDataContext();
However when I try to query against the table I get to:
var query = from o in db1.
and from there I can't see the table.... the dbml shows the table has public access.
how can i do a join in this query to another table
dynamic list = _db.Users.Where(m => m.vcr_UserName != "superadmin" ).OrderByDescending(m => m.int_UserId).ToPagedList(Cpage, defaultPageSize);
i must have a topagedList there