In this article I will explain with an example, how to insert data into database with Stored Procedure using Dapper library in Windows Forms (WinForms) Application using C# and VB.Net.

Installing Dapper package using Nuget

In order to install Dapper library using Nuget, please refer my article Install Dapper from Nuget in Visual Studio.


I have made use of the following table Customers with the schema as follows.
Insert with Stored Procedure using Dapper in C# and VB.Net
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 Insert data into the SQL Server database table.
This Stored Procedure accepts Name and Country parameters, which are used to Insert the records in Customers Table.
CREATE PROCEDURE [Customers_InsertCustomer]
      @Name VARCHAR(100),
      @Country VARCHAR(50)
    INSERT INTO [Customers]

Form Design

The following Form consists of:
Label – For labelling the controls.
TextBox – For capturing Name to be inserted.
ComboBox – For selecting Country name to be inserted.
Insert with Stored Procedure using Dapper in C# and VB.Net


You will need to import the following namespaces.
using Dapper;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
Imports Dapper
Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration

Inserting with Stored Procedure using Dapper in Windows Forms

Inside the Form Load event handler, the ComboBox items are added.
When Insert button is clicked, first the connection is read from App.Config file.
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, using ExecuteScalar method of Dapper library with Stored Procedure record is inserted into the SQL Server database.
Note: For more details on ExecuteScalar method, please refer my article Understanding Dapper ExecuteScalar in C# and VB.Net.
Finally, the TextBox and ComboBox values are set to empty and CustomerId of the inserted record is displayed in MessageBox.
private void Form1_Load(object sender, EventArgs e)
    cbCountries.Items.Add("United States");
private void OnInsert(object sender, EventArgs e)
    int customerId;
    string spName = "Customers_InsertCustomer";
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
        string name = txtName.Text;
        string country = cbCountries.SelectedItem.ToString();
        customerId = Convert.ToInt32(con.ExecuteScalar(spName, new { name, country }, commandType: CommandType.StoredProcedure));
    txtName.Text = string.Empty;
    cbCountries.Text = string.Empty;
    MessageBox.Show("Inserted Customer ID: " + customerId);
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    cbCountries.Items.Add("United States")
End Sub
Private Sub OnInsert(sender As Object, e As EventArgs) Handles btnInsert.Click
    Dim customerId As Integer
    Dim spName As String = "Customers_InsertCustomer"
    Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(constr)
        Dim name As String = txtName.Text
        Dim country As String = cbCountries.SelectedItem.ToString()
        customerId = Convert.ToInt32(con.ExecuteScalar(spName, New With { name, country }, commandType:=CommandType.StoredProcedure))
    End Using
    txtName.Text = String.Empty
    cbCountries.Text = String.Empty
    MessageBox.Show("Inserted Customer ID: " & customerId)
End Sub


Insert with Stored Procedure using Dapper in C# and VB.Net

Record after Insert in database

Insert with Stored Procedure using Dapper in C# and VB.Net