Using GridView inside UpdatePanel

Question

I have an Updatepanel and Gridview inside it.

<asp:UpdatePanel ID="uplPanel" UpdateMode="Conditional" runat="server" OnLoad="uplPanel_Load">
<ContentTemplate>
 <asp:GridView ID="gvPrList" runat="server" AutoGenerateColumns="false" AllowPaging="false"
       AllowSorting="false" CssClass="list-table" HeaderStyle-CssClass="header">
       <Columns>
     <ItemTemplate>
               <asp:Button ID="btnEdit" runat="server" Text="Edit" CssClass="button save" OnCommand="onPrItemCmd"
                   CommandName="editRow" CommandArgument='<%#Bind("ID") %>' Style="width: 80px" />
               <asp:Button ID="btnDelete" runat="server" Text="Delete" CssClass="button save" OnCommand="onPrItemCmd"
                   CommandName="deleteRow" CommandArgument='<%#Bind("ID") %>' Style="width: 80px" />
           </ItemTemplate>
       </asp:TemplateField>
   </Columns>

When I click on my buttons inside the Griview, it does not fire the events. Any idea?

Answer 1

You need to add OnCommand event of GridView and then handle that inside that event like this:

OnRowCommand="gvPrList_OnRowCommand" 

or alternatively add a click event for the individual button and then handle in the code behind file:

<asp:Button ID="btnEdit" runat="server" OnClick="btnEdit_Click" Text="Edit" CssClass="button save"
                   OnCommand="onPrItemCmd" CommandName="editRow" CommandArgument='<%#Bind("ID") %>' Style="width: 80px" />

Answer 2

I did the following and it works

I replace asp button with html button and call javascript method to fire Update Panal Load event.

<input id="btnDelete1" type="button" onclick="javascript:DeletePrItem('<%# Eval("ID") %>');" value="Delete" class="button save" style="width: 80px" />

My Js :

    function DeletePrItem(_Id) {
        __doPostBack('<%= uplPanel.ClientID %>', _Id);
    }

My Code behind :

    protected void uplPanel_Load(object sender, EventArgs e)
    {
        var arg = Request.Params.Get("__EVENTARGUMENT");

        if (arg != null)
        {
            if (arg != "")
            {
                string recordId = arg.ToString();
                //Do deletetion and rebind data grid

    }
     }
}

Answer 3

I had the same issue where column buttons with a OnClick were causing a postback but the OnClick method was not being hit. When I commented out the update panel and it all worked.

I resolved this issue by adding a postback trigger for the grid within the update panel:

</ContentTemplate>
   <Triggers>
       <asp:PostBackTrigger ControlID="uxWebDataGrid" />
   </Triggers>
</asp:UpdatePanel>

Hope this helps someone else!

Answer 4

I had a similar issue.

Depending on your situation, as in mine...All of the clickable controls inside of the update panel I will want to be triggers; So i was simply able to use the UpdatePanel property 'ChildrenAsTriggers="true"' so solve the issue.

    <asp:UpdatePanel runat="server" ID="UPCommunicationlogForm" ChildrenAsTriggers="true" >

This solved my issue, now my edit and delete buttons that are generated from the ItemTemplate inside my gridview call their respective methods on the server.

Answer 5

Please add this code into the UpdatePanel.

</ContentTemplate> 
 <Triggers>
   <asp:PostBackTrigger ControlID="gvPrList" EventName="Click" />
 </Triggers>
 </asp:UpdatePanel>

Answer 6

This would be the Event Handler for your command in the codebehind:

protected void onPrItemCmd(object sender, CommandEventArgs e)
    {
        //do whatever you want
        //probably you will need the "ID" or "CommandArgument":
        string myArgumentID = e.CommandArgument.ToString();

        uplPanel.Update(); //since the UpdatePanel is set *UpdateMode="Conditional"*
    }

UPDATE:

Probably, you might be doing some validation when you click on buttons. If so, you need to add CausesValidation="false" in your buttons or links properties

Answer 7

I added an OnRowCommand Event and add this trigger to the UpdatePanel:

<Triggers>
    <asp:AsyncPostBackTrigger ControlID="gvPrList" EventName="RowCommand" />
</Triggers>

Note that it's an Async trigger.

Answer 8

This helped me. In my case I was changing a value in a asp:DropDownList control and then going back to the server to update my asp:GridView which is in a different asp:UpdatePanel. I just forgot to add code to refresh the Update Panel with the list. Once I did that everything worked fine.

Server side

System.Data.DataSet ds = MySQL.DAL.GetRecord(sql);
GV_View.DataSource = ds;
GV_View.DataBind();
UP_MainList.Update(); //refresh the update panel

Aspx code

            <asp:UpdatePanel runat="server" ID="UP_ListChange" UpdateMode="Conditional">
                <ContentTemplate>
                    <asp:DropDownList runat="server" ID="ddFilter" DataTextField="Desc" AutoPostBack="true" DataValueField="Detail" OnSelectedIndexChanged="GV_CodeView_RefreshScreen" ></asp:DropDownList>
                </ContentTemplate>
             </asp:UpdatePanel>
            <div class="medium">Select Filter to view database codes</div>
        </div>
        <div class="div-row-header" runat="server" id="divList">
        <asp:UpdatePanel runat="server" ID="UP_MainList" UpdateMode="Conditional">
        <ContentTemplate>
            <asp:GridView ID="GV_View" runat="server" AllowSorting="True" AutoGenerateColumns="false" DataKeyNames="id">
                <Columns>
                    <asp:BoundField DataField="Id" HeaderText="Id" Visible="false" />
                    <asp:BoundField DataField="Type_Cd" HeaderText="Code" />
                    <asp:BoundField DataField="Short_Desc" HeaderText=" Description" />
                    <asp:TemplateField HeaderText="">
                        <ItemTemplate>
                            <asp:Button ID="Code_Edit" runat="server" Text="Edit" onClick="GV_Code_Edit_Click" class="button" />
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>             
        </ContentTemplate>

        </asp:UpdatePanel>
        </div>