VB.NET ASP.NET Sql Command Update Statement Source Code Example

Posted by asp.net videos on Wednesday, December 16, 2009 · 3 Comments

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Sql Command Update Statement

Purpose: – Illustrates using Sql Command Update Statement in VB.NET ASP.NET.

Prerequistes:

Install Visual Web Developer 2008
Install SQL Server Express
Download Northwind and Pubs Databases
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 SqlCommandUpdate 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 SqlCommandUpdate
Click on copy code in code below to copy code into web form SqlCommandUpdate.aspx
Click on copy code in second set of code below to copy code into code-behind SqlCommandUpdate.aspx.vb
Right-click on SqlCommandUpdate.aspx in solution explorer and select view in browser

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

 XML |   copy code | ?  
01 
02 <%@ Page Language="VB" AutoEventWireup="false" CodeFile="SqlCommandUpdate.aspx.vb" Inherits="Database_ADONET_SqlCommandUpdate" %>
03  
04 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
05  
06 <html xmlns="http://www.w3.org/1999/xhtml">
07 <head runat="server">
08     <title></title>
09 </head>
10 <body>
11     <form id="form1" runat="server">
12     <div>
13         <table>
14         <tr>
15         <td>Find this First Name: </td><td>
16         <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
17         </td>
18         </tr>
19         <tr>
20         <td>Update Last Name with this: </td><td>
21         <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
22         </td>
23         </tr>
24         </table><br />
25         <asp:Button ID="btnUpdate" runat="server" Text="Update" /><br />
26         <asp:Label ID="lblErrMsg" runat="server" Text="lblErrMsg" ForeColor="#FF3300" 
27             Visible="False"></asp:Label><br />
28         <asp:GridView ID="GridView1" runat="server" DataSourceID="sdsEmployees">
29         </asp:GridView>
30         <asp:SqlDataSource ID="sdsEmployees" runat="server" 
31             ConnectionString="<%$ ConnectionStrings:Northwind_ConnectionString %>" 
32             SelectCommand="SELECT [FirstName], [LastName] FROM [Employees]">
33         </asp:SqlDataSource>
34     </div>
35     </form>
36 </body>
37 </html>
38  
39

Step 2: Click on Copy Code to Cut-n-paste code into SqlCommandUpdate.aspx.vb

 Visual Basic |   copy code | ?  
01 
02 Imports System
03 Imports System.Data
04 Imports System.Data.SqlClient
05  
06 Partial Class Database_ADONET_SqlCommandUpdate
07     Inherits System.Web.UI.Page
08  
09     Protected Sub btnUpdate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
10         Dim thisConnection As New SqlConnection(ConfigurationManager.ConnectionStrings("Northwind_ConnectionString").ConnectionString)
11  
12         'Create Command object
13         Dim nonqueryCommand As SqlCommand = thisConnection.CreateCommand()
14  
15         Try
16             ' Open Connection
17             thisConnection.Open()
18  
19             ' 1. Create Command
20             ' Sql Update Statement
21             Dim updateSql As String = _
22                "UPDATE Employees " & _
23                "SET LastName = @LastName " & _
24                "WHERE FirstName = @FirstName"
25             Dim UpdateCmd As New SqlCommand(updateSql, thisConnection)
26  
27             ' 2. Map Parameters
28  
29             UpdateCmd.Parameters.Add("@FirstName", _
30                SqlDbType.NVarChar, 10, "FirstName")
31  
32             UpdateCmd.Parameters.Add("@LastName", _
33                SqlDbType.NVarChar, 20, "LastName")
34  
35  
36             UpdateCmd.Parameters("@FirstName").Value = txtFirstName.Text
37             UpdateCmd.Parameters("@LastName").Value = txtLastName.Text
38  
39             UpdateCmd.ExecuteNonQuery()
40  
41         Catch ex As SqlException
42             ' Display error
43             lblErrMsg.Text = ex.ToString()
44             lblErrMsg.Visible = True
45  
46         Finally
47             ' Close Connection
48             thisConnection.Close()
49  
50         End Try
51         GridView1.DataBind()
52     End Sub
53  
54     Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
55         lblErrMsg.Visible = False
56  
57     End Sub
58 End Class
59  
60

Step 3: Click on Copy Code to Cut-n-paste code into web.config right after the appSettings section

 XML |   copy code | ?  
1 
2 <connectionStrings>
3     <add name="Northwind_ConnectionString"
4       connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI" />
5     <add name="Pubs_ConnectionString"
6       connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI" />
7   </connectionStrings>
8

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Filed under Code Samples · Tagged with asp.net, example, Source code, Sql Command, Update Statement, vb.net

Comments

3 Responses to “VB.NET ASP.NET Sql Command Update Statement Source Code Example”

Hafiz Muhammad Mumtaz says:
January 15, 2010 at 3:29 am
HIIII HELLO …
Im a Student in vb.net . plz ,my help
COODING. GIVE ME
SAVE, INSERT, UPDATE, PRECIOUS, BACK, and BANK STATMENT COODING, ETC……………
OF MY PROJECT ,. PLZ GIVE ME ABCE COODING….
THANKS,,,..//////……,.,,/////..//

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VB.NET ASP.NET Sql Command Update Statement Source Code Example

Sql Command Update Statement

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01
02	<%@ Page Language="VB" AutoEventWireup="false" CodeFile="SqlCommandUpdate.aspx.vb" Inherits="Database_ADONET_SqlCommandUpdate" %>
03
04	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
05
06	<html xmlns="http://www.w3.org/1999/xhtml">
07	<head runat="server">
08	<title></title>
09	</head>
10	<body>
11	<form id="form1" runat="server">
12	<div>
13	<table>
14	<tr>
15	<td>Find this First Name: </td><td>
16	<asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
17	</td>
18	</tr>
19	<tr>
20	<td>Update Last Name with this: </td><td>
21	<asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
22	</td>
23	</tr>
24	</table><br />
25	<asp:Button ID="btnUpdate" runat="server" Text="Update" /><br />
26	<asp:Label ID="lblErrMsg" runat="server" Text="lblErrMsg" ForeColor="#FF3300"
27	Visible="False"></asp:Label><br />
28	<asp:GridView ID="GridView1" runat="server" DataSourceID="sdsEmployees">
29	</asp:GridView>
30	<asp:SqlDataSource ID="sdsEmployees" runat="server"
31	ConnectionString="<%$ ConnectionStrings:Northwind_ConnectionString %>"
32	SelectCommand="SELECT [FirstName], [LastName] FROM [Employees]">
33	</asp:SqlDataSource>
34	</div>
35	</form>
36	</body>
37	</html>
38
39

01
02	Imports System
03	Imports System.Data
04	Imports System.Data.SqlClient
05
06	Partial Class Database_ADONET_SqlCommandUpdate
07	Inherits System.Web.UI.Page
08
09	Protected Sub btnUpdate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
10	Dim thisConnection As New SqlConnection(ConfigurationManager.ConnectionStrings("Northwind_ConnectionString").ConnectionString)
11
12	'Create Command object
13	Dim nonqueryCommand As SqlCommand = thisConnection.CreateCommand()
14
15	Try
16	' Open Connection
17	thisConnection.Open()
18
19	' 1. Create Command
20	' Sql Update Statement
21	Dim updateSql As String = _
22	"UPDATE Employees " & _
23	"SET LastName = @LastName " & _
24	"WHERE FirstName = @FirstName"
25	Dim UpdateCmd As New SqlCommand(updateSql, thisConnection)
26
27	' 2. Map Parameters
28
29	UpdateCmd.Parameters.Add("@FirstName", _
30	SqlDbType.NVarChar, 10, "FirstName")
31
32	UpdateCmd.Parameters.Add("@LastName", _
33	SqlDbType.NVarChar, 20, "LastName")
34
35
36	UpdateCmd.Parameters("@FirstName").Value = txtFirstName.Text
37	UpdateCmd.Parameters("@LastName").Value = txtLastName.Text
38
39	UpdateCmd.ExecuteNonQuery()
40
41	Catch ex As SqlException
42	' Display error
43	lblErrMsg.Text = ex.ToString()
44	lblErrMsg.Visible = True
45
46	Finally
47	' Close Connection
48	thisConnection.Close()
49
50	End Try
51	GridView1.DataBind()
52	End Sub
53
54	Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
55	lblErrMsg.Visible = False
56
57	End Sub
58	End Class
59
60

1
2	<connectionStrings>
3	<add name="Northwind_ConnectionString"
4	connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI" />
5	<add name="Pubs_ConnectionString"
6	connectionString="Server=(local)\SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI" />
7	</connectionStrings>
8