Question

Getting .net to put the doPostBack function in the page

Asked by: imt21

I have a datagrid that I want to add the following functionallity to:

private void grdItems_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
      if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
      {
            e.Item.Attributes.Add "onMouseOver", "this.className='MouseOver';this.style.cursor='hand'");
            e.Item.Attributes.Add("onClick", "javascript:__doPostBack('selectItem','" + e.Item.Cells[0].Text + "')");
      }
      if (e.Item.ItemType == ListItemType.Item)
            e.Item.Attributes.Add ("onMouseOut", "this.className='clsItem';");
      if (e.Item.ItemType == ListItemType.AlternatingItem)
            e.Item.Attributes.Add ("onMouseOut", "this.className='clsAItem';");
}

to allow the selection of one of the rows.

My problem is, without any other controls on the page, how do I get .net to add the __dopostback Javascript function to the page?

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Asked On
2005-09-09 at 04:48:25ID21555961
Tags

dopostback

Topic

Programming for ASP.NET

Participating Experts
5
Points
250
Comments
6

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Answers

 

by: ihenryPosted on 2005-09-09 at 09:29:28ID: 14853113

If you need to do a postback after clicking a cell in the datagrid, I'd suggest you to add a server control like LinkButton to the datagrid column and apply some css formatting to the control. For example:

      <asp:DataGrid id="DataGrid2" runat="server" AutoGenerateColumns="False">
            <Columns>
                  <asp:TemplateColumn>
                        <ItemTemplate>
                              <asp:LinkButton Runat="server" ID="myLink" style="text-decoration:None; cursor:hand">
                                    <%# DataBinder.Eval( Container.DataItem, "iprice" ) %>
                              </asp:LinkButton>
                        </ItemTemplate>
                  </asp:TemplateColumn>
            </Columns>
      </asp:DataGrid>

And catch the postback response in ItemCommand event, like so

Private Sub DataGrid2_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid2.ItemCommand
      If e.Item.ItemType = ListItemType.AlternatingItem Or e.Item.ItemType = ListItemType.Item Then
        If e.CommandName.Equals("PostMeBack") Then
            ' do something here
        End If
      End If
End Sub


HTH
Henry

 

by: s_sansanwalPosted on 2005-09-09 at 20:12:23ID: 14854808

 

by: eyal_mtPosted on 2005-09-10 at 13:25:42ID: 14857218

Just call GetPostBackClientEvent once - say from your onload function.
This will render the __doPostback script.

 

by: Darth_helgePosted on 2005-10-28 at 04:09:08ID: 15177914

i have the same problem. how do i do this?
in my .aspx page i have this: onclick="javascript:__doPostBack('FxPShopcart1','AddItem$130101$1')"


i have this codebehind

Public Class _default
      Inherits System.Web.UI.Page
      Implements IPostBackEventHandler
......
....
      Sub TittenTei(ByVal eventArgument As String) Implements IPostBackEventHandler.RaisePostBackEvent
            'HERE I WILL MANAGE THE POSTBACK BUT DONT KNOW HOW
      End Sub      'RaisePostBackEvent


But nothing happens. the __doPostBack does not get generated by asp.net
what is wrong?

 

by: lem2802Posted on 2006-02-01 at 12:09:19ID: 15847154

No comment has been added to this question in more than 21 days, so it is now classified as abandoned..
I will leave the following recommendation for this question in the Cleanup topic area:
Split - bettewen Darth_helge and ihenry

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

lem2802
EE Cleanup Volunteer

20120131-EE-VQP-002

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