ADO Database ASP.Net

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  4. Checking for Update errors using the RowUpdated event (C#)
<%@ Page Language="C#" %>


    protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
    {
        if (e.Exception != null)
        {
            this.lblErrorMessage.Text = e.Exception.Message;
        }
    }



    Untitled Page


    
    

                              Runat="server" 
                      DataSourceID="SqlDataSource1"
                      DataKeyNames="CustomerID" 
                      AutoGenerateColumns="False"
                      AllowSorting="True" 
                      AllowPaging="True"
                      AutoGenerateEditButton="true" 
                      OnRowUpdated="GridView1_RowUpdated">
             
                               FirstPageText="Go to the first page" 
                  LastPageText="Go to the last page" Mode="NextPreviousFirstLast">
             
            
                                     SortExpression="CustomerID" Visible="False">
                                    DataNavigateUrlFields="CustomerID,Country" SortExpression="CompanyName"
                    DataNavigateUrlFormatString=
                        "http://www.foo.com/Customer.aspx?id={0}&country={1}"
                    DataTextField="CompanyName">
                
                                     SortExpression="ContactName">
                                     SortExpression="ContactTitle">
                                     SortExpression="Address">
                                     SortExpression="City">
                                     DataField="Region" SortExpression="Region">
                                     SortExpression="PostalCode">
                                     SortExpression="Country">
                                     SortExpression="Phone">
                                     SortExpression="Fax">
            
        
                     SelectCommand="SELECT * FROM [Customers]"
             ConnectionString="<%$ ConnectionStrings:AppConnectionString1 %>"
             DataSourceMode="DataSet"
             UpdateCommand="UPDATE [Customers] SET [CompanyName] = @CompanyName,
                  [ContactName] = @ContactName, [ContactTitle] = @ContactTitle,
                  [Address] = @Address, [City] = @City, [Region] = @Region, 
                  [PostalCode] = @PostalCode, [Country] = @Country, [Phone] = @Phone,
                  [Fax] = @Fax WHERE [CustomerID] = @original_CustomerID">
             
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
             
             
        
    

    


File: Web.config

  
  
                     connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True"
             providerName="System.Data.SqlClient" />