Hello!
I want to add dropdown to my Grid View control. I added that using the inheriting ITemplate but whenever i am doing any action on the page it showing me an error as:
Server Error in '/' Application.
Failed to load viewstate. The control tree into which viewstate is being
loaded must match the control tree that was used to save viewstate during the
previous request. For example, when adding controls dynamically, the controls
added during a post-back must match the type and position of the controls added
during the initial request.
Description:
An unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error and
where it originated in the code.
Exception Details:
System.Web.HttpException: Failed to load viewstate. The control tree into
which viewstate is being loaded must match the control tree that was used to
save viewstate during the previous request. For example, when adding controls
dynamically, the controls added during a post-back must match the type and
position of the controls added during the initial request.
Source
Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of the
exception can be identified using the exception stack trace below.
|
Stack Trace:
[HttpException (0x80004005): Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.]
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +306
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Page.LoadAllState() +312
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
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Version Information: Microsoft .NET Framework Version:2.0.50727.3603;
ASP.NET Version:2.0.50727.3082
My Code:
DropDownList ddlAssigne = new DropDownList();
ddlAssigne.ID = "ddlAssigne";
ddlAssigne.AutoPostBack = false;
if (dt != null)
{
ddlAssigne.DataSource = dt;
ddlAssigne.DataValueField = "ID";
ddlAssigne.DataTextField = "AcManager";
ddlAssigne.DataBind();
}
else
ddlAssigne.Enabled = false;
ddlAssigne.EnableViewState = false;
t.ItemTemplate = new CreateItemTemplateDDL("ddlAssigne", "ID", "AcManager", dt);
GrdViewTenders.Columns.Add(t);
I am able to get my desired result only when it get loaded but after that its showing the same error!!
Can anyone help me in this issue.