C# ASP.NET Sql Command Insert Statement Source Code Example

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Sql Command Insert Statement

Purpose: – Illustrates using Sql Command Insert Statement in C-Sharp ASP.NET.

Prerequistes:

1. Install C# (Express or Standard Edition)
2. Install SQL Server Express
3. Download Northwind and Pubs Databases
4. Attach Northwind Database to Databases in Sql Express
5. Attach pubs Database to Databases in Sql Express

Notes:

• You can build your own library of syntax examples by using same web site over and over and just add new web forms to it.

Instructions:

1. Use Visual Web Developer 2008
2. Create new web site;
   • Click File/New Web Site
   • Select ASP.NET Website Template
   • Select C-Sharp for Language
   • name of Web Site could be CSharp_ASPNET_Syntax.
3. Add New folder named "Database_ADONET"
   • Right-click project name in solution explorer;
   • add new folder;
   • name of folder could be: Database_ADONET
4. Add Web Form Named SqlCommandInsert to Database_ADONET folder
   • Right-click Database_ADONET folder;
   • add new item;
   • Select Web Form
   • Check place code behind in separate file
   • Web Form name could be SqlCommandInsert
5. Click on copy code in code below to copy code into web form SqlCommandInsert.aspx
6. Click on copy code in second set of code below to copy code into code-behind SqlCommandInsert.aspx.cs
7. Right-click on SqlCommandInsert.aspx in solution explorer and select view in browser

Step 1: Click on Copy Code to Cut-n-paste code into SqlCommandInsert.aspx

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<%@ Page Language="C#" AutoEventWireup="false" CodeFile="SqlCommandInsert.aspx.cs" Inherits="Database_ADONET_SqlCommandInsert" %>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head id="Head1" runat="server">
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    <title></title>
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</head>
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<body>
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    <form id="form1" runat="server">
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    <div>
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        <table>
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        <tr>
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        <td>First Name: </td><td>
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        <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
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        </td>
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        </tr>
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        <tr>
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        <td>Last Name: </td><td>
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        <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
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        </td>
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        </tr>
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        </table><br />
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        <asp:Button ID="btnInsert" runat="server" Text="Insert" 
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            onclick="btnInsert_Click" /><br />
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        <asp:Label ID="lblErrMsg" runat="server" Text="lblErrMsg" ForeColor="#FF3300" 
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            Visible="False"></asp:Label><br />
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        <asp:GridView ID="GridView1" runat="server" DataSourceID="sdsEmployees">
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        </asp:GridView>
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        <asp:SqlDataSource ID="sdsEmployees" runat="server" 
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            ConnectionString="<%$ ConnectionStrings:Northwind_ConnectionString %>" 
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            SelectCommand="SELECT [FirstName], [LastName] FROM [Employees]">
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        </asp:SqlDataSource>
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    </div>
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    </form>
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</body>
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</html>
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using System;
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using System.Data;
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using System.Data.SqlClient;
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using System.Configuration;
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partial class Database_ADONET_SqlCommandInsert : System.Web.UI.Page
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{
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    protected void btnInsert_Click(object sender, System.EventArgs e)
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    {
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        SqlConnection thisConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["Northwind_ConnectionString"].ConnectionString);
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        //Create Command object
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        SqlCommand nonqueryCommand = thisConnection.CreateCommand();
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        try
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        {
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            // Open Connection
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            thisConnection.Open();
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            // Create INSERT statement with named parameters
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            nonqueryCommand.CommandText = "INSERT  INTO Employees (FirstName, LastName) VALUES (@FirstName, @LastName)";
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            // Add Parameters to Command Parameters collection
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            nonqueryCommand.Parameters.Add("@FirstName", SqlDbType.VarChar, 10);
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            nonqueryCommand.Parameters.Add("@LastName", SqlDbType.VarChar, 20);
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            nonqueryCommand.Parameters["@FirstName"].Value = txtFirstName.Text;
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            nonqueryCommand.Parameters["@LastName"].Value = txtLastName.Text;
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            nonqueryCommand.ExecuteNonQuery();
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        }
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        catch (SqlException ex)
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        {
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            // Display error
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            lblErrMsg.Text = ex.ToString();
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            lblErrMsg.Visible = true;
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        }
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        finally
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        {
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            // Close Connection
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            thisConnection.Close();
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        }
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        GridView1.DataBind();
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    }
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    protected void  
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Page_Load(object sender, System.EventArgs e)
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    {
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        lblErrMsg.Visible = false;
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    }
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}
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<connectionStrings>
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    <add name="Northwind_ConnectionString"
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      connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI" />
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    <add name="Pubs_ConnectionString"
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      connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI" />
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  </connectionStrings>
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