<telerik:RadGrid>
<telerik:GridTemplateColumn Visible="true" DataField="Signature" HeaderText="Signature"
HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" UniqueName="Signature">
<ItemTemplate>
<telerik:RadBinaryImage ID="RadBinaryImage1" runat="server" DataValue='<%#Eval("Signature") is DBNull ? null : Eval("Signature")%>'
AutoAdjustImageControlSize="false" ResizeMode="Fit" Height="50px" Width="120px" />
</ItemTemplate>
<InsertItemTemplate>
<telerik:RadAsyncUpload runat="server" ID="ImgImages2" AllowedFileExtensions=".jpg,.jpeg,.png,.gif"
MaxFileInputsCount="1" Skin="Outlook" Width="110px" PostbackTriggers="RbtnReset1" />
<asp:Label ID="lblupload2" runat="server" Visible="true" CssClass="error"></asp:Label>
</InsertItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn Visible="true" DataField="chkNumber" HeaderText="Check Number"
HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" UniqueName="chkNumber">
<ItemTemplate>
<%# Eval("chkNumber")%><%--.ToString().PadLeft(4, '0')%>--%>
</ItemTemplate>
<InsertItemTemplate>
<telerik:RadTextBox ID="rdtxtchkNumber1" runat="server" Width="160px" MaxLength="4"
onclick="shouldConfirm = true;" Text='<%# Eval("chkNumber") %>'>
</telerik:RadTextBox>
<telerik:RadButton ID="RbtnReset1" runat="server" Width="40px" CausesValidation="true"
Text="Reset" OnClick="RbtnResetCheckNoinInsert_Click" />
</InsertItemTemplate>
</telerik:GridTemplateColumn>
I am upload a Image ,using rad async upload ..after that I am click on the reset button ,I don't want to loss the image .how persist the image upload by user up to the user click on insert or update in rad grid. using post back trigger at server side code. plz help me.