GridView RowCommand event not firing

Question

I have a GridView that looks something like this:

<asp:GridView 
    ID="GridView1"
    AllowPaging="true"
    OnRowCommand="RowCommand"
    OnPageIndexChanging="gridView_PageIndexChanging"
    Runat="server">
    <Columns>
        ...
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="Button1" ButtonType="Button" CommandName="ItemExport" CommandArgument='<%# Eval("EXPORT") %>'
                    Text="Export" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
        ...
    </Columns>
 </asp:GridView>

Here is RowCommand :

protected void RowCommand(object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "ItemExport")
    {
        // etc.
    }
}

Clicking the button is not firing the RowCommand event at all. However, RowCommand fires when I click a page index in the GridView's pager.

Answer 1

You must not bind your grid on postbacks in Page_Load, only when something changed that causes the Grid to reload data(fe Sorting,Paging) and only in the appropriate event-handlers.

Another possible reason: Have you disabled ViewState somewhere?

Answer 2

Use CausesValidation="false" in button tag. It can solve the problem.

Answer 3

I just had a colleague who encountered the same problem; his was caused by the onrowcommand= attribute not being set in the asp:GridView element. This should be set to the name of the handler which will be handling the event.

... just in case someone has the same issue!

Answer 4

Put the grid.Databind() inside if (!IsPostBack)

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        grid.DataBind();
    }
}

Answer 5

If your code is like this:

protected void Page_Load(object sender, EventArgs e)
{
    BindGrid(dgv);
    if (!IsPostBack)
    {

    }
}

Put BindGrid() inside the !isPostBack block

Answer 6

Tried the above answers and still could not get a post back. Ended up being a Unique ID issue. I had two <ItemTemplate> with buttons that had the same ids. (In different grid views. My second one was in a User Control)

Changing the <asp:Button ID="" /> to a Unique ID solved the post back issue for me.

Just thought I'd post for any one else who tried the other options with no luck.

Answer 7

您还可以检查 HttpContext.Current.Request.Form["__EVENTTARGET"] ，如果它以控件的 ID 结尾，则重新绑定 GridView 并使用带有事件目标的 Page.FindControl 来查找触发事件的控件

Answer 8

My problem was requiredfieldvalidator

Solution to that was: I disable it at post back and then re-enable it after the row command.

Answer 9

他们都做了但一无所获然后发现了这一点：onrowcommand="GridView1_RowCommand" 在 html 的 GridView1 定义行上。

Answer 10

我通过从 GridView 中删除所有事件处理程序，然后重建代码，然后一次将它们添加回一个来修复我的这个问题版本。