With the button you can do this:

<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </ContentTemplate> </asp:UpdatePanel>

We click on the button, an asynchronous request is sent, the corresponding function is executed on the server, and something is recorded in the label.

Is it possible to do this: put in the UpdatePanel textBox and GridView, type the text in the textBox, for each click a request is sent to the server in the function that fills the GridView. But in the ASP.NET project there is no KeyUp event for the textbox control.

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