The text of Label1
doesn't change, what could be the cause of this issue?
try
{
string connectionString = @"Data Source = (localdb)\MSSQLLocalDB; Initial Catalog = db1; Integrated Security = True";
SqlConnection cnn = new SqlConnection(connectionString);
string query = "SELECT RNO FROM TABLE1 WHERE RNO='" + PRrno.Text + "'";
SqlCommand cd = new SqlCommand(query, cnn);
cnn.Open();
SqlDataReader reader = cd.ExecuteReader();
while (reader.Read())
{
Label1.Text = reader["RNO"].ToString();
}
reader.Close();
cnn.Close();
}
Gaurav Thapa, like I said in one of the comments, make sure in the aspx file your elements have runat="server" also put all the elements you want to get refreshed inside an Ajax Update Panel
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>UpdatePanel</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel runat="server" id="UpdatePanel" updatemode="Always">
<ContentTemplate>
<asp:Label runat="server" id="PRrno" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
You have to get query output in data table and then from there convert that DataTable value to string. Check if you have access to your label.
Label.Text = // String that you converted from DataTable
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.