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POTo Display controls based on the dropdownlist selected item?
 

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    <p>For Dropdownlist items i have written the following code:</p> <pre><code> protected void dropdowndatasrc() { con = new OleDbConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ToString()); string command = "select eventname from Events"; cmd = new OleDbCommand(command); dataadapter = new OleDbDataAdapter(command, con); DataSet dataset = new DataSet(); con.Open(); DataTable dt = new DataTable("PayEvent"); dataadapter.Fill(dt); DropDownList4.DataSource = dt; DropDownList4.DataTextField = dt.Columns[0].ToString(); // DropDownList4.DataValueField = dt.Columns[0].ToString(); DropDownList4.DataBind(); } </code></pre> <p>I have to display controls based on the value of the dropdownlist (in the access database there is a column named payevent in that it has Yes/No datatype if the selected item in the database have 'yes' means display controls if not no controls must be displayed)</p> <p>I have tried this code but not worked</p> <pre><code>protected void DropDownList4_SelectedIndexChanged(object sender, EventArgs e) { TextBox11.Text = DropDownList4.SelectedItem.Text; con = new OleDbConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ToString()); string query = "select payevent from Events where eventname=@dropdownlist"; con.Open(); //string query="select payevent from Events"; cmd = new OleDbCommand(query, con); cmd.Parameters.Add("@dropdownlist", selectedtext); OleDbDataReader reader = cmd.ExecuteReader(); while (reader.Read()) { string value = reader.GetValue((0)).ToString(); TextBox11.Text = value.ToString(); if (value == "True" || value == "true") { pnl.Visible = false; } else if (value == "False" || value == "false") { pnl.Visible = true; } } } </code></pre> <p><strong>the table structure as follows:</strong></p> <pre><code>**eventname payevent** Work Shop Yes emsisoft workshop Yes ECE No CSE No </code></pre> <p>Need help !!!</p>
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