VB.NET ASP.NET Table Load From SqlDataReader Source Code Example

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VB.NET ASP.NET Table Load From SqlDataReader Source Code Examples

Purpose: – Illustrates using DataTable loaded from SqlDataReader in VB.NET 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 Visual Basic for Language
   • name of Web Site could be VBNET_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.vb
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="VB" AutoEventWireup="false" CodeFile="TableLoadFromSqlDataReader.aspx.vb" Inherits="ADONET_TableLoadFromSqlDataReader" %>
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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:GridView> 
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    </div>
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    </form>
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</body>
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</html>
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 Visual Basic | 
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Imports System
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Imports System.Data
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Imports System.Data.SqlClient
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Partial Class ADONET_TableLoadFromSqlDataReader
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    Inherits System.Web.UI.Page
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    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
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        Dim con As SqlConnection = New SqlConnection("Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI")
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        Dim cmd As 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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        Dim Table1 As DataTable
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        Table1 = New DataTable("Employees")
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        'creating a table named Employees
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        Dim Row1 As DataRow
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        'declaring row for the table
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        Dim EmployeeID As DataColumn = 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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        Dim FullName As DataColumn = 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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            Dim reader As SqlDataReader = cmd.ExecuteReader '(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.Item("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.Item("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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            End While
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            reader.Close()
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        Finally
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            con.Close()
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        End Try
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        GridView1.DataSource = Table1
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        GridView1.DataBind()
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    End Sub
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End Class
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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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