I have the problem to use webdropdown,

I found webdropdown_selectedchanged event on events queue, it fires utile another bostback. even I set attribute postback= true for select change.   I really want to know why??

Thnaks.

Martin

Angel,

thanks for the response.  I bind with th efollowing code snippet. 

private void PopulateDDLs()

            {

                WebDropDown ddlAddContracts = (WebDropDown)gvContracts.Rows[0].FindControl("ddlAddContracts");

                WebDropDown ddlAddSubcontracts = (WebDropDown)gvSubcontracts.Rows[0].FindControl("ddlAddSubcontracts");

                WebDropDown ddlAddSubcontractor = (WebDropDown)gvSubcontractor.Rows[0].FindControl("ddlAddSubcontractor");

                WebDropDown ddlAddFinance = (WebDropDown)gvFinance.Rows[0].FindControl("ddlAddFinance");

                WebDropDown ddlAddPM = (WebDropDown)gvPM.Rows[0].FindControl("ddlAddPM");

                ddlAddPM.DataSource = ddlAddContracts.DataSource = ddlAddSubcontracts.DataSource =

                    ddlAddSubcontractor.DataSource = ddlAddFinance.DataSource = ContractInfo.ScrubAllUserNames();

                ddlAddPM.DataBind();

                ddlAddContracts.DataBind();

                ddlAddSubcontracts.DataBind();

                ddlAddSubcontractor.DataBind();

                ddlAddFinance.DataBind();

                ddlAddPM.Items.Insert(0, new DropDownItem("", ""));

                ddlAddContracts.Items.Insert(0, new DropDownItem("", ""));

                ddlAddSubcontracts.Items.Insert(0, new DropDownItem("", ""));

                ddlAddSubcontractor.Items.Insert(0, new DropDownItem("", ""));

                ddlAddFinance.Items.Insert(0, new DropDownItem("", ""));

            }

I have 102 items that get bound to the drop down lists.

I cast to them b/c they are embedded in a grid.  I have no performance issues on loading the page, in fact it loads in less than one second with all of the other stuff that is taking place. 

But on the button click, when I click, the button will stay pressed for 5 seconds before it even fires the btnClick event!  When I change the WebDropDown out with the traditional ASP DDL, everything works as it shoud. 

yes it is ony one row of binding.  Kind of hard to explain, but how we had to do it for this.  I have used the webgrid with a ddl row.  Really nice solution most of the time.  In this case, I have a master gridview, with an embedded gridview, and a table below the embedded gridview for adding peoples roles to the grid. 

I change thed the enableautofiltering="server" and got no speed up at all.

Hopefully you have more suggestions?  It really seems to be a problem with the webdropdown. 

This page in general is giving me grief.  Async panels just flat out do not work on top of this. 

More info to add for anyone that may have a solution.

I had to add a few more grids w/ drop downs to the page.  Now I get this error.  So I think Angels suspicion of scripts slowing me down is correct, now just how to fix it. As soon as I click yes, everything runs in <1 sec

Angel, you have been EXTREMELY helpful!  thank you very much.

I was binding on the initial, but not the post back. 

Thank you again!

I am marking this as fixed.  Would it be possible for you to look at my thread about not getting all of the images imported?

this is my last thing for this particular page

http://forums.infragistics.com/forums/t/26721.aspx

Hi,

In my example ViewState is disabled, and this works fine. In fact if ViewState is Enabled, it's not needed to DataBind on every postback, only on the first page load.

Thanks,

Angel 

that works as long as view state is not disabled on the webdropdown. 

PopulateDDLs is called on the PageLoad

Hi,

I am not sure where is your PopulateDDLs() method called. Since you are calling DataBind() there, you should make sure it is called before the Button Clicked event handler. I tried this code and it works fine :

    protected void Page_Load(object sender, EventArgs e)

    {

        WebDropDown1.DataBind();

    }

    protected void Unnamed2_Click(object sender, EventArgs e)

    {

        string selVal = WebDropDown1.SelectedValue;

    }

Thanks,

Angel 

Still getting the Oject not set to an instance of an object error.

Here is the Button click Even that fires to update the DB

  protected void btnAddPM_Click(object sender, EventArgs e)
            {
                WebDropDown ddlAddPM = (WebDropDown)gvPM.Rows[0].FindControl("ddlAddPM");
                 AddRole(int.Parse(ddlAddPM.SelectedValue), "pm");
                 BindUpdatedGrid(((GridView)gvPM.Rows[0].FindControl("gvPMDetails")), "pm");
            }

Here is the function called from the page load to Bind the DDL's

 private void PopulateDDLs()
            {
                WebDropDown ddlAddContracts = (WebDropDown)gvContracts.Rows[0].FindControl("ddlAddContracts");
                WebDropDown ddlAddSubcontracts = (WebDropDown)gvSubcontracts.Rows[0].FindControl("ddlAddSubcontracts");
                WebDropDown ddlAddFinance = (WebDropDown)gvFinance.Rows[0].FindControl("ddlAddFinance");
                WebDropDown ddlAddPM = (WebDropDown)gvPM.Rows[0].FindControl("ddlAddPM");
                WebDropDown ddlAddBilling = (WebDropDown)gvBilling.Rows[0].FindControl("ddlAddBilling");
                WebDropDown ddlAddConsultant = (WebDropDown)gvConsultant.Rows[0].FindControl("ddlAddConsultant");
                WebDropDown ddlAddCorporateSecurity = (WebDropDown)gvCorporateSecurity.Rows[0].FindControl("ddlAddCorporateSecurity");
                WebDropDown ddlAddCustomer = (WebDropDown)gvCustomer.Rows[0].FindControl("ddlAddCustomer");
                WebDropDown ddlAddExternal = (WebDropDown)gvExternal.Rows[0].FindControl("ddlAddExternal");
                WebDropDown ddlAddLegal = (WebDropDown)gvLegal.Rows[0].FindControl("ddlAddLegal");
                WebDropDown ddlAddPricing = (WebDropDown)gvPricing.Rows[0].FindControl("ddlAddPricing");

                List<User> users = ContractInfo.ScrubAllUserNames();

                List<User> usedUsers = ContractInfo.GetScrubbedUsersByContract(_conId);
                var userIds = (from u in usedUsers
                               select u.id);

                List<User> remainingUsers = (from u in users
                                             where !userIds.Contains(u.id)
                                             select u).ToList();


                ddlAddPM.DataSource = ddlAddContracts.DataSource = ddlAddSubcontracts.DataSource = ddlAddConsultant.DataSource =
                    ddlAddFinance.DataSource = ddlAddBilling.DataSource = ddlAddConsultant.DataSource = ddlAddPricing.DataSource =
                    ddlAddCorporateSecurity.DataSource = ddlAddCustomer.DataSource = ddlAddExternal.DataSource = ddlAddLegal.DataSource =
                    remainingUsers;
               
                ddlAddPM.DataBind();
                ddlAddContracts.DataBind();
                ddlAddSubcontracts.DataBind();
                ddlAddFinance.DataBind();
                ddlAddBilling.DataBind();
                ddlAddConsultant.DataBind();
                ddlAddCorporateSecurity.DataBind();
                ddlAddCustomer.DataBind();
                ddlAddExternal.DataBind();
                ddlAddLegal.DataBind();
                ddlAddPricing.DataBind();

                ddlAddPM.Items.Insert(0, new DropDownItem("", ""));
                ddlAddContracts.Items.Insert(0, new DropDownItem("", ""));
                ddlAddSubcontracts.Items.Insert(0, new DropDownItem("", ""));
                ddlAddFinance.Items.Insert(0, new DropDownItem("", ""));
                ddlAddBilling.Items.Insert(0, new DropDownItem("", ""));
                ddlAddConsultant.Items.Insert(0, new DropDownItem("", ""));
                ddlAddCorporateSecurity.Items.Insert(0, new DropDownItem("", ""));
                ddlAddCustomer.Items.Insert(0, new DropDownItem("", ""));
                ddlAddExternal.Items.Insert(0, new DropDownItem("", ""));
                ddlAddLegal.Items.Insert(0, new DropDownItem("", ""));
                ddlAddPricing.Items.Insert(0, new DropDownItem("", ""));
            }