C# ASP.NET Table SqlDataReader Example – SqlDataReader Table Example C# ASP.NET

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C# ASP.NET Table SqlDataReader Example – SqlDataReader Table Example C# ASP.NET

Purpose: – Illustrates using DataTable load from SqlDataReader in C-Sharp ASP.NET.

Prerequistes:

1. Install Visual Web Developer 2008
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 "ADONET"
   • Right-click project name in solution explorer;
   • add new folder;
   • name of folder could be: ADONET
4. Add Web Form Named TableLoadFromSqlDataReader to ADONET folder
   • Right-click ADONET folder;
   • add new item;
   • Select Web Form
   • Check place code behind in separate file
   • Web Form name could be TableLoadFromSqlDataReader
5. Click on copy code in code below to copy code into web form TableLoadFromSqlDataReader.aspx
6. Click on copy code in second set of code below to copy code into code-behind TableLoadFromSqlDataReader.aspx.cs
7. Right-click on TableLoadFromSqlDataReader.aspx in solution explorer and select view in browser

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

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< %@ Page Language="C#" AutoEventWireup="true" CodeFile="TableLoadFromSqlDataReader.aspx.cs" Inherits="ADONET_TableLoadFromSqlDataReader" %>
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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 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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        <asp :GridView ID="GridView1" runat="server">
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        </asp>
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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.Collections;
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partial class ADONET_TableLoadFromSqlDataReader : System.Web.UI.Page
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{
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    protected void // ERROR: Handles clauses are not supported in C#
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Page_Load(object sender, System.EventArgs e)
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    {
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        SqlConnection con = new SqlConnection("Server=(local)\\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI");
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        SqlCommand cmd = new SqlCommand();
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        cmd.CommandText = "SELECT EmployeeID, FirstName + ' ' + LastName as FullName FROM Employees";
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        cmd.Connection = con;
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        DataTable Table1;
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        Table1 = new DataTable("Employees");
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        //creating a table named Employees
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        DataRow Row1;
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        //declaring row for the table
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        DataColumn EmployeeID = new DataColumn("EmployeeID");
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        //declaring a column named EmployeeID
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        EmployeeID.DataType = System.Type.GetType("System.Int32");
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        //setting the datatype for the column
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        Table1.Columns.Add(EmployeeID);
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        //adding the column to table
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        DataColumn FullName = new DataColumn("FullName");
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        FullName.DataType = System.Type.GetType("System.String");
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        Table1.Columns.Add(FullName);
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        try {
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            con.Open();
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            SqlDataReader reader = cmd.ExecuteReader();
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            //(CommandBehavior.SingleRow)
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            while (reader.Read()) {
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                Row1 = Table1.NewRow();
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                //declaring a new row
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                Row1["EmployeeID"] = reader.GetInt32(0);
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                //filling the row with values. Item property is used to set the field value.
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                Row1["FullName"] = reader.GetString(1);
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                //filling the row with values. adding FullName
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                Table1.Rows.Add(Row1);
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            }
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            reader.Close();
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        }
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        finally {
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            con.Close();
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        }
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        GridView1.DataSource = Table1;
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        GridView1.DataBind();
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    }
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}
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<connectiontableloadfromsqldatareaders>
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    <add name="Northwind_ConnectionTableLoadFromSqlDataReader"
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      connectionTableLoadFromSqlDataReader="Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI" />
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    <add name="Pubs_ConnectionTableLoadFromSqlDataReader"
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      connectionTableLoadFromSqlDataReader="Server=(local)\SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI" />
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  </connectiontableloadfromsqldatareaders>
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