Question

I am trying to display a dataset to my ASP.NET application. It seems that when I click the button event, the data is not displaying in the grid.

I have a basic page with the following:

<form id="form1" runat="server">
     <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <asp:UpdatePanel runat="server" id="UpdatePanel" updatemode="Conditional">
            <ContentTemplate>
                <asp:GridView ID="GridView1" runat="server" Width="200" Height="300">
                </asp:GridView>
                <asp:Button runat="server" id="UpdateButton1" onclick="UpdateButton_Click" text="Update" />               
            </ContentTemplate>
        </asp:UpdatePanel>

    </form>

Then in the code behind, I have the following:

protected void UpdateButton_Click(object sender, EventArgs e)
        {
            string SQLConfigSettings = ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString;
            SqlConnection sqlconn = new SqlConnection(SQLConfigSettings);

            sqlconn.Open();

            SqlDataAdapter adapter = new SqlDataAdapter("Select * from Student", sqlconn);

            DataSet ds = new DataSet();
            adapter.Fill(ds);

            GridView1.DataSource = ds;
            UpdatePanel.Update();

        }

Am I missing something? Shoudlnt the dataset be diaplayed in the grid?
When I click the button nothing happens.

Thanks 🙂

Answer 1

You need to add

GridView1.DataBind() right after Gridview1.DataSource.

So it becomes:

...
          DataSet ds = new DataSet();
            adapter.Fill(ds);

            GridView1.DataSource = ds;
            GridView1.DataBind();
            UpdatePanel.Update();

If you need more information about the .DataBind method check MSDN on it