Sure, just add your datagrid column modifications in the ItemCreated event handler.

Ex. in Pixels:
Code:

'VB
Private Sub GridCreated (ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles GridCreated
  e.Item.Cells(0).Width = New Unit (100, UnitType.Pixel)
  e.Item.Cells(1).Width = New Unit (75, UnitType.Pixel)
End Sub

//C#
private void GridCreated (object sender, DataGridItemEventArgs e)
{
  e.Item.Cells[0].Width = new Unit (100, UnitType.Pixel);
  e.Item.Cells[1].Width = new Unit (75, UnitType.Pixel);
}

Furthermore, you can accomodate other Unit structures such as Percentage.

Ex. in Percentage:
Code:

'VB
Private Sub GridCreated (ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles GridCreated
  e.Item.Cells(0).Width = New Unit (50, UnitType.Percentage)
  e.Item.Cells(1).Width = New Unit (25, UnitType.Percentage)
   End Sub

//C#
private void GridCreated (object sender, DataGridItemEventArgs e)
{
  e.Item.Cells[0].Width = new Unit (50, UnitType.Percentage);
  e.Item.Cells[1].Width = new Unit (25, UnitType.Percentage);
}

Hope this helps.

- Jimmy Markatos

thanks a lot.

your suggestion will work.

I just solved my problem by setting the header template and itemtemplate widths. I had the grid in a div and that is why I could not see the widths. Once I set the table layout of the grid to fixed, I saw the columns being sized.

again, many thanks for your interest.

You're welcome. Glad to help!

I have one more question:

When using template columns dynamically, are they stored in the view state?
It seems not but I would like to have them as I have editable text boxes in the template columns that user enters data in...

Many thanks,
anabhra

Yes, becuase by default all data within a DataSet is typically persisted in ViewState. Have you explcitly disabled Page ViewState? I don't see how your dynamically sized columns would reset themselves.

At any rate, try enabling the DataGrid's DataGrid.EnableViewState property to true to maintains its state across HTTP requests.

Furthermore, you can ideally stored any values you require to be persistant by storing those values in Session State.

This should take care of it.

- Jimmy Markatos

I read this article on msdn:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwebuiwebcontrolsdatagridcolumncollectionclasstopic.asp

It seems to say that derived coumns (from say itemtemplate) that are added at run time are not saved to view state.

They suggest having all needed cols and set visible attribute of those not needed for display to be set to false.

I do have the EnableViewState=true (I think that is the default) on the page and grid.  I have 2 other grids that do maintain the state...

-anabhra

Right, I misunderstood you, as I was referring to DataSet data and I simply specified if you explicitly disabled view state, as yes, of course, true is the default. Now if you utilize what else I've mentioned then you shouldn’t have any issues.

Also, I don't know what you mean with 2 other grids that maintain state. Are they all the same with dynamic item templates and all? As I can’t see your code I don’t know what you may have overlooked or otherwise.

Therefore, employ the Page_Init method to help with this, but ultimately whenever something doesn't hold state by normal means as you would’ve hope it would then make use of view state.

Hope this helps.

Hi all,

I just re-added the forum post containing the new version of my article code. I just thought it easier to repost it again, since I find people requesting this and since the topics become hidden after a while, it won't show up unless you select all topics.

Anyway, here is the link:

Custom DG Ctrl w/ Dual Paging, Drag&Drop/Sort DL code forum post

-Jimmy Markatos

I'm having the same problem.  Please let me know if you find anything.

how can i implement sorting for all the column in this sample?

Hi,

You can implement one way as found in my other article here on DF - Dynamic Column Sorting and Paging in ASP.NET or you can download the upgraded version of my custom datagrid control with drag and drop columns and sorting.

-Jimmy Markatos

I am having a datagrid where i am binding all boundcolumns from dataset and along with it i am having 2 templates , one is label and another checkbox . these two controls are bound to datagrid using itemplate class (i.e. dynamically) . when i am attaching checkbox and allocating event checkedchanged , its not getting fired and also i am unable to get how many checkbox are clicked (if autopostback=false) . if autopostback is true then datagrid is not displayed but if i again bind datagrid with all bouncontrols usinf sessions then i get same old datagrid but all checkbox are false .

I hope i am clear with my problem . please help me in getting event fired for checkbox and also getting count for number of check box clicked .

Thanks in advance,
Rujuta

There will be some 20 questions and  for each question there will be  4 choices.what i want to do is to select multiple answers by clicking the checkbox. i m using asp.net,vb.net
pls help me

we have written the code using radio button for selecting single item.but we  want to replace it with checkbox to select multiple items. the code using radio button is given below .pls correct it with checkbox

Imports System.Data
Imports System.Data.SqlClient
Imports ELearning.LAIDBC
Public Class Test
  Inherits System.Web.UI.Page
  Public ds As New DataSet()
  Public ds1 As New DataSet()
  Public ds2 As New DataSet()
  Public Score, Answered As Integer
  Protected WithEvents txtNoOfqns As System.Web.UI.WebControls.TextBox
#Region " Web Form Designer Generated Code "

  'This call is required by the Web Form Designer.
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

  End Sub

  Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
      'CODEGEN: This method call is required by the Web Form Designer
      'Do not modify it using the code editor.
      InitializeComponent()
  End Sub
  Protected WithEvents lblCourse As System.Web.UI.WebControls.Label
  Protected WithEvents lblCourseName As System.Web.UI.WebControls.Label
  Protected WithEvents lblNoOfQuestions As System.Web.UI.WebControls.Label
  Protected WithEvents lblDurationInMinutes As System.Web.UI.WebControls.Label
  Protected WithEvents txtduration As System.Web.UI.WebControls.TextBox
  Protected WithEvents lblTimeLeft As System.Web.UI.WebControls.Label
  Protected WithEvents lblAnswered As System.Web.UI.WebControls.Label
  Protected WithEvents txtanswered As System.Web.UI.WebControls.TextBox
  Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
  Protected WithEvents submitbtn As System.Web.UI.WebControls.Button
  Protected WithEvents lab2 As System.Web.UI.WebControls.Label
  Protected WithEvents Lab4 As System.Web.UI.WebControls.Label
  Protected WithEvents Label2 As System.Web.UI.WebControls.Label
  Protected WithEvents lab1 As System.Web.UI.WebControls.Label
  Protected WithEvents txtans As System.Web.UI.WebControls.TextBox

#End Region
  Private ConDB As New ELearning.LAIDBC()
  Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
      If Session("Log") = Nothing Then
          Response.Redirect("frmLogin.aspx")
      End If

      If Not IsPostBack Then

          Try
              Session("Course") = Session("URL2")
              Session("Id") = "reshm-001"
              Session("CandId") = "00000001"
              'Response.Write(Session("Id"))
              'Response.End()
              Session("TotScore") = Nothing
              Dim count1, str11 As String
              ds1 = New DataSet()
              ConDB.OpenConnection()

              ds1 = ConDB.ExecuteSPReturnDS("ELS_ExecuteQuery", "select count(f_UserId) from tbl_Score where f_UserId='" & (Session("CandId")) & "'  and  f_courseid='" & Session("Id") & "' ")
              ConDB.CloseConnection()
              count1 = ds1.Tables(0).Rows(0)(0)
              str11 = "select count(f_UserId) from tbl_Score where f_UserId='" & (Session("CandId")) & "'  and  f_courseid='" & Session("Id") & "'"
              'Response.Write(str11)
              'Response.End()
              If count1 < 3 Then
                  ' Response.Write(str11 & "," & count1)
                  ds2 = New DataSet()
                  Dim count2 As Integer
                  ConDB.OpenConnection()
                  ds2 = ConDB.ExecuteSPReturnDS("ELS_ExecuteQuery", "select count(f_UserId) from tbl_Score where f_UserId='" & (Session("CandId")) & "' and f_result='P'")
                  count2 = ds2.Tables(0).Rows(0)(0)
                  Response.Write(count2)
                  ConDB.CloseConnection()
                  If count2 > 0 Then

                      Session("msg") = "You have already passed for the test"
                      Response.Redirect("frmChance.aspx")
                  Else
                      Dim qrstr As String
                      Dim NoOfQuestionsToDisplay As Integer
                      Dim Mstring As String
                      Dim TotalNoOfQuestions As Integer
                      courseidselect()
                      Try
                          NoOfQuestionsToDisplay = txtNoOfqns.Text
                          Session("NoOfQuestionsToDisplay ") = txtNoOfqns.Text
                          ds = New DataSet()
                          ConDB.OpenConnection()
                          ds = ConDB.ExecuteSPReturnDS("ELS_ExecuteQuery", "select  count(*)  from tbl_Question where f_CourseId='" & Session("Id") & "'")
                          ConDB.CloseConnection()
                          TotalNoOfQuestions = ds.Tables(0).Rows(0)(0)
                          Session("TotQns") = TotalNoOfQuestions
                      Catch ex As Exception
                          R

I have created a Custom control using your article but i am having problem in sorting and update
as i use a class which implements itemplate interface  for this and create the function for update and
sorting  in same class.when i click on them the changes are made in database and dataset but they does not display on page and display on second click as these function are called in last i.e the getdatagrid() method is not called after them hence no changes are viewed.Please help me to resolve this problem.Can i use ipostbackdatahandler.

Thanks in Advance

Quote:

[1]Posted by taxiturner on 3 May 2005 10:25 PM[/1]
LiteralControl lc = (LiteralControl) sender;
DataGridItem container = (DataGridItem) lc.NamingContainer;
lc.Text = ((DataRowView) container.DataItem) [columnName].ToString();

I believe that "container" is your problem.
try:

lc.Text = ((DataRowView)e.Item.DataItem)[columnName].ToString();


Now, if someone could just tell me how to cast a DataGridItemCollection as a TableRowCollection so that I don't get this error, that would be helpful.