In this article I will explain with an example, how to update data into Database using Stored Procedure in Windows Forms (WinForms) Applications using C# and VB.Net.
 
 
Database
I have made use of the following table Customers with the schema as follows.
Update data into Database using Stored Procedure in Windows Forms
 
I have already inserted few records in the table.
Update data into Database using Stored Procedure in Windows Forms
 
Note: You can download the database table SQL by clicking the download link below.
         Download SQL file
 
 
Stored Procedure
The following Stored Procedure will be used to Update data into the SQL Server database table.
This Stored Procedure accepts CustomerId, Name and Country parameters, which are used to UPDATE the records in Customers Table.
CREATE PROCEDURE [Customers_UpdateCustomer]
      @CustomerId INT
     ,@Name VARCHAR(100)
     ,@Country VARCHAR(50)
AS
BEGIN
      UPDATE Customers
      SET [Name] = @Name,
          [Country] = @Country
      WHERE [CustomerId] = @CustomerId
END
 
 
Form Design
The following Form consists of:
Label – For labelling controls.
TextBox – For capturing the values of CustomerId, Name and Country.
Button – For updating records.
Update data into Database using Stored Procedure in Windows Forms
 
 
Adding ConnectionString to the App.Config file
You need to add the Connection String in the ConnectionStrings section of the App.Config file in the following way.
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <connectionStrings>
        <add name="constr" connectionString="Data Source=Mudassar-PC\SQL2019;Initial Catalog=AjaxSamples;Integrated Security=true" />
    </connectionStrings>
</configuration>
 
 
Namespace
You will need to import the following namespaces.
C#
using System.Configuration;
using System.Data.SqlClient;
 
VB.Net
Imports System.Configuration
Imports System.Data.SqlClient
 
 
Updating the record in Database
When Update button is clicked, the connection string is fetched from the App.Config file and object of SqlConnection class is created using it.
Note: For more details on how to read Connection String from App.Config file, please refer my article .Net 4.5: Read (Get) Connection String from App.Config file using C# and VB.Net.
 
Then, an object of SqlCommand class is created and the UPDATE query is passed to it as parameter.
The values of the CustomerId, Name and Country are added as parameter to SqlCommand object.
And the connection is opened and the ExecuteNonQuery function is executed.
Note: For more details on how to use ExecuteNonQuery function, please refer Understanding SqlCommand ExecuteNonQuery in C# and VB.Net.
 
Finally, based on whether record is updated or not, an appropriate message is displayed using MessageBox class.
C#
private void OnUpdate(object sender, EventArgs e)
{
    string spName = "Customers_UpdateCustomer";
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand(spName))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@CustomerId", txtId.Text);
            cmd.Parameters.AddWithValue("@Name", txtName.Text);
            cmd.Parameters.AddWithValue("@Country", txtCountry.Text);
            cmd.Connection = con;
            con.Open();
            int i = cmd.ExecuteNonQuery();
            con.Close();
 
            if (i > 0)
            {
                MessageBox.Show("Customer record updated.");
            }
 
            else
            {
                MessageBox.Show("Customer not found.");
            }
        }
    }
}
 
VB.Net
Private Sub OnUpdate(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
    Dim spName As String = "Customers_UpdateCustomer"
    Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(constr)
        Using cmd As SqlCommand = New SqlCommand(spName)
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@CustomerId", txtId.Text)
            cmd.Parameters.AddWithValue("@Name", txtName.Text)
            cmd.Parameters.AddWithValue("@Country", txtCountry.Text)
            cmd.Connection = con
            con.Open()
            Dim i As Integer = cmd.ExecuteNonQuery()
            con.Close()
            If i > 0 Then
                MessageBox.Show("Customer record updated.")
            Else
                MessageBox.Show("Customer not found.")
            End If
        End Using
    End Using
End Sub
 
 
Screenshot
Update data into Database using Stored Procedure in Windows Forms
 
 
Downloads
Download Code