A field or property with the name 'RequestID' was not found on the selected data source.

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C#

ASP.NET

SQL

SQL-Server

, +

Hello

Plz help
I have this code for gridview data bind.
I have one row in table

protected void Page_Load(object sender, EventArgs e)
        {
            

            string connection = "Data Source=ip;Initial Catalog=commonlogin;User ID=sa;Password=; ";


            SqlConnection conn = new SqlConnection(connection);
            conn.Open();
            SqlDataAdapter ad = new SqlDataAdapter("SELECT * FROM tbl_SqlImage", conn);
            //SqlCommand cmd = new SqlCommand("SELECT * FROM tbl_SqlImage", conn);
            //SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            ad.Fill(ds);
            if (ds.Tables[0].Rows.Count != 0)
            {
                GridView1.DataSource = ds;
                GridView1.DataBind();
            }

I get following error:

A field or property with the name 'RequestID' was not found on the selected data source.

Plz help