<%@ Import Namespace="System.Data" %>
<%@ Import namespace="System.Data.OleDb" %>
<html>
<head>
<title>Validating a Field</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<table id="Table1"
style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px"
cellSpacing="0" cellPadding="0" width="300" border="0">
<tr>
<td style="WIDTH: 115px">
<asp:Label id="Label1" runat="server">Category Name</asp:Label>
</td>
<td>
<asp:TextBox id="txtCategoryName" runat="server" width="193" />
</td>
</tr>
<tr>
<td style="WIDTH: 115px">
<asp:Label id="Label2" runat="server">Description</asp:Label>
</td>
<td>
<asp:TextBox id="txtDescription" runat="server" width="193" />
</td>
</tr>
<tr>
<td style="WIDTH: 115px" colSpan="2">
<asp:Button id="btnInsert" runat="server"
OnClick="btnInsert_Click" width="298" text="INSERT!" />
</td>
</tr>
</table>
<asp:RequiredFieldValidator id="rfvCategoryName" runat="server"
style="Z-INDEX: 102; LEFT: 316px; POSITION: absolute; TOP: 14px"
ErrorMessage="Please insert the new category name"
ControlToValidate="txtCategoryName" />
</form>
</body>
</html>
<script language="c#" runat="server">
OleDbConnection objConnection;
private void Page_Load(object sender, System.EventArgs e)
{
string strConnection = "Provider=Microsoft.Jet.OleDb.4.0;";
strConnection += @"data source=\\genfs1\www11\etning\xml\Northwind.mdb";
}
private void btnInsert_Click(object sender, System.EventArgs e)
{
if (Page.IsValid)
{
String strSQL = "INSERT INTO Categories (CategoryName, Description) VALUES (?, ?)";
OleDbCommand dbComm = new OleDbCommand(strSQL, objConnection);
dbComm.Parameters.Add("CategoryName", OleDbType.VarChar, 32, "CategoryName");
dbComm.Parameters.Add("Description", OleDbType.VarChar, 128, "Description");
dbComm.Parameters["CategoryName"].Value = txtCategoryName.Text;
dbComm.Parameters["Description"].Value = txtDescription.Text;
try
{
objConnection.Open();
dbComm.ExecuteNonQuery();
}
catch (Exception ex)
{
Response.Write(ex.Message);
Response.End();
}
finally
{
if (objConnection.State == ConnectionState.Open);
objConnection.Close();
}
Response.Write("A new record has been added");
Response.End();
}
}
</script> 
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