VB.NET ASP.NET Sql Command Select Statement Source Code Example
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Sql Command Select Statement Source Code Example
Purpose: – Illustrates using Sql Command Select Statement in VB.NET ASP.NET.
Prerequistes:
- Install Visual Web Developer 2008
- Install SQL Server Express
- Download Northwind Database
- Attach Northwind Database to Databases in Sql Express
- 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:
- Use Visual Web Developer 2008
- 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.
- Add New folder named "Database_ADONET"
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: Database_ADONET
- Add Web Form Named SqlCommandSelect 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 SqlCommandSelect
- Click on copy code in code below to copy code into web form SqlCommandSelect.aspx
- Click on copy code in second set of code below to copy code into code-behind SqlCommandSelect.aspx.vb
- Right-click on SqlCommandSelect.aspx in solution explorer and select view in browser
Step 1: Click on Copy Code to Cut-n-paste code into SqlCommandSelect.aspx
| XML | | copy code | | ? |
< %@ Page Language="VB" AutoEventWireup="false" CodeFile="SqlCommandSelect.aspx.vb" Inherits="Database_ADONET_SqlCommandSelect" %> |
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
<html> |
<head> |
<title>Sql Command Select VB.NET ASP.NET</title> |
</head> |
<body> |
<form id="Form1" runat="server"> |
<p> |
Find: |
<asp:textbox id="TextBox1" runat="server" Text="*"></asp:textbox> |
<asp:button id="Button1" onclick="Button1_Click" runat="server" Text="Go"></asp:button> |
</p> |
<p> |
<asp:datagrid id="DataGrid1" runat="server" BorderWidth="5px" BorderColor="Black" CellPadding="5"> |
<headerstyle font-size="X-Small" font-names="Arial Narrow" font-bold="True" forecolor="White" backcolor="Black"></headerstyle> |
<alternatingitemstyle backcolor="Silver"></alternatingitemstyle> |
<itemstyle font-size="X-Small" font-names="Arial Narrow"></itemstyle> |
</asp:datagrid> |
</p> |
</form> |
</body> |
</html> |
Step 2: Click on Copy Code to Cut-n-paste code into SqlCommandSelect.aspx.vb
| Visual Basic | | copy code | | ? |
Imports System |
Imports System.Data |
Imports System.Data.SqlClient |
Partial Class Database_ADONET_SqlCommandSelect |
Inherits System.Web.UI.Page |
Function FindByTitle(ByVal search As String) As System.Data.DataSet |
Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("Pubs_ConnectionString").ConnectionString) |
Dim queryString As String = "" |
If search = "*" Then |
queryString = "SELECT [titles].[title], [titles].[price], [titles].[notes], [titles].[pubdate] F" & _ |
"ROM [titles]" |
Else |
queryString = "SELECT [titles].[title], [titles].[price], [titles].[notes], [titles].[pubdate] F" & _ |
"ROM [titles] WHERE ([titles].[title] like @search + '%')" |
End If |
Dim sqlCmd As System.Data.SqlClient.SqlCommand = New System.Data.SqlClient.SqlCommand(queryString, con) |
If search <> "*" Then |
sqlCmd.Parameters.Add("@search", System.Data.SqlDbType.NVarChar).Value = search |
End If |
Dim dataAdapter As System.Data.SqlClient.SqlDataAdapter = New System.Data.SqlClient.SqlDataAdapter(sqlCmd) |
Dim dataSet As System.Data.DataSet = New System.Data.DataSet |
dataAdapter.Fill(dataSet) |
Return dataSet |
End Function |
Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) |
Dim sTitle As String = TextBox1.Text |
DataGrid1.DataSource = FindByTitle(sTitle) |
DataGrid1.DataBind() |
End Sub |
End Class |
Step 3: Click on Copy Code to Cut-n-paste code into web.config right after the appSettings section
| XML | | copy code | | ? |
<connectionstrings> |
<add name="Nortwind_ConnectionString" |
connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI" /> |
<add name="Pubs_ConnectionString" |
connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI" /> |
</connectionstrings> |
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