Help needed to pass client side values in asp.net website

How can i pass value from grid view to a pop up in client side. I have a edit button in the grid view and when user clicks that the value(EditExpiresBy) from selected row should be in a text box in the pop up.

<asp:Panel ID="EditPanel" runat="server">
  开发者_JAVA技巧          <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
            </asp:ToolkitScriptManager>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
        <asp:TextBox ID="txt_EditExpiresBy" runat="server" ></asp:TextBox>

                    <asp:Button ID="btn_EditSave" runat="server" Text="Save" onclick="btn_EditSave_Click" />

                </ContentTemplate>
            </asp:UpdatePanel>
        </asp:Panel>

and a PopupControlExtender.

How can I pass the value in client side. help needed

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One way to do this is to have a DetailsView that is linked to the SelectedValue property of your GridView. You can put the DetailsView in the popup, and it will display whatever was selected in the GridView

Sample DetailsView Note: you would be putting this in place of the txt_EditExpiresBy TextBox control

<asp:DetailsView ID="detailsView" runat="server" AutoGenerateRows="False" 
    DataKeyNames="yourIDField" DataSourceID="detailsSqlDataSource" 
    Height="50px" Width="287px" >
    <Fields>
        <asp:BoundField DataField="ExpiresBy" HeaderText="Expires By" 
            SortExpression="ExpiresBy" />
        <%--Whatever other fields you want to include--%>
    </Fields>
</asp:DetailsView>

Sample Data source (for the DetailsView)

<asp:SqlDataSource ID="detailsSqlDataSource" runat="server" 
    ConnectionString="Your Connection String" SelectCommand="SELECT [ExpiresBy] FROM [tableName] WHERE yourTableID = @yourTableID">
    <SelectParameters>
        <asp:ControlParameter ControlID="yourGridView" Name="yourTableID" 
            PropertyName="SelectedValue" />
    </SelectParameters>
</asp:SqlDataSource>

See the ControlParameter in this DataSource looks at the ID of the row that was selected in the GridView and uses that to populate the DetailsView.

Let me know if any of this is not clear and I'll try to explain myself better, this is just the way I usually do it.