VB.NET & MySql.Data.MySqlClient - ExecuteScalar()

Author: admin | Posted: 13-06-2010 | Category: VB.NET & MySql.Data.MySQLClient

VB.NET & MySql.Data.MySQLClient - ExecuteScalar() - How to learn Connector/NET ADO.NET component MySql.Data.MySqlClient namespace is the .NET Framework Data Provider for MySql data source, Using the ExecuteScalar method for Executes the query, and returns the first column of the first row in the result set returned by the query (MySQL Server Database)

ShotDev Focus:
- VB.NET & MySql.Data.MySQLClient - ExecuteScalar()

Example

ExecuteScalar.aspx

<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="MySql.Data.MySqlClient"%>
<%@ Page Language="VB" %>
<script runat="server">

Sub Page_Load(sender As Object, e As EventArgs)
Dim myValue As Object
myValue = exExecuteScalar()
lblText.Text = myValue.ToString()
End Sub

Function exExecuteScalar() As Object
Dim objConn As MySql.Data.MySqlClient.MySqlConnection
Dim objCmd As MySql.Data.MySqlClient.MySqlCommand
Dim strConnString,strSQL As String
Dim myScalar As Object

strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false"
objConn = New MySql.Data.MySqlClient.MySqlConnection(strConnString)
objConn.Open()

strSQL = "SELECT MAX(Used) FROM customer"

objCmd = New MySql.Data.MySqlClient.MySqlCommand()
With objCmd
.Connection = objConn
.CommandType = CommandType.Text
.CommandText = strSQL
End With

myScalar = objCmd.ExecuteScalar()

objCmd = Nothing
objConn.Close()
objConn.Close()
objConn = Nothing

Return myScalar
End Function

</script>
<html>
<head>
<title>ShotDev.Com Tutorial</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Label id="lblText" runat="Server"></asp:Label>
</form>
</body>
</html>

Screenshot

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Download this script.