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GeneralRe: ASP.NET Tables tr and td Pin
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GeneralRe: ASP.NET Tables tr and td Pin
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GeneralRe: ASP.NET Tables tr and td Pin
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GeneralRe: ASP.NET Tables tr and td Pin
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GeneralRe: ASP.NET Tables tr and td Pin
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QuestionCan i develop mvc5 application without entity framework? Pin
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QuestionASP.Net URL gets redirected Pin
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Questionhelp me ... - Can't understand logic of code Pin
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QuestionFile Upload for each row in GridView Pin
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Questionproblem with response.writefile and triggers Pin
fa_itb31-Dec-14 0:14
fa_itb31-Dec-14 0:14 
i used telerik component
this is my code:

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
<ClientEvents OnRequestStart="onRequestStart" />
<AjaxSettings>
VB


<telerik:AjaxSetting AjaxControlID="RadGrid1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="FormLoading" />
<telerik:AjaxUpdatedControl ControlID="Lbl_Msg" />
</UpdatedControls>
</telerik:AjaxSetting>
<telerik:AjaxSetting AjaxControlID="tree_Image" EventName="SelectedNodeChanged">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="FormLoading" />
<telerik:AjaxUpdatedControl ControlID="Lbl_Msg" />
<telerik:AjaxUpdatedControl ControlID="tree_Permit" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>

html:
<telerik:RadGrid ID="RadGrid1" runat="server" Width="100%" >
<MasterTableView>
<Columns>
<telerik:GridButtonColumn ButtonType="ImageButton" CommandName="SaveImage" HeaderText="saveImage"
ImageUrl="~/images/saveImage.png" HeaderTooltip="saveImage" UniqueName = "SaveImage" >
</telerik:GridButtonColumn>
<telerik:GridButtonColumn ButtonType="ImageButton" CommandName="ViewImage" HeaderText="viewImage"
ImageUrl="~/images/openImage.png" HeaderTooltip="viewImage">
</telerik:GridButtonColumn>
<telerik:GridBoundColumn HeaderText="(Byte)imageSize" DataField="Size" UniqueName="Size">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn HeaderText="imageName" DataField="Files" UniqueName="Files">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn HeaderText="location" DataField="parentFolder" UniqueName="parentFolder"
Display="false">
</telerik:GridBoundColumn>
</Columns>
</MasterTableView>
<ClientSettings EnablePostBackOnRowClick="false">
<ClientEvents OnCommand="OnCommand" />
</ClientSettings>
</telerik:RadGrid>

\\\\\

Protected Sub RadGrid1_ItemCommand(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles RadGrid1.ItemCommand
Try
If e.CommandName = "SaveImage" Then
Dim FileName As String = RadGrid1.Items(e.Item.ItemIndex).Item("Files").Text
Dim parentFolder As String = RadGrid1.Items(e.Item.ItemIndex).Item("parentFolder").Text
Dim size As String = RadGrid1.Items(e.Item.ItemIndex).Item("Size").Text

Response.AddHeader("Content-Disposition", "attachment;filename=" & FileName)
Response.AddHeader("Content-Lenght", size)
Response.ContentType = "application/octet-stream"

Dim Url As String = parentFolder & "\" & FileName

ScriptManager.GetCurrent(Me).RegisterPostBackControl(RadGrid1.Items(e.Item.ItemIndex).Item("SaveImage"))

Response.WriteFile(Url)
Response.End()

Else
BindGrid(tree_Image.SelectedValue())
End If
Catch ex As Exception
'ShowException(ex.Message, MultiView1.ActiveViewIndex)
Lbl_Msg.Text = ex.Message
End Try
End Sub
but when i click "saveImage" button in grid i get this error : Control with ID '' being registered through RegisterAsyncPostBackControl or RegisterPostBackControl must implement either INamingContainer, IPostBackDataHandler, or IPostBackEventHandler

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