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VB.NET & ExecuteScalar() The ExecuteScalar executes the query, and returns the first column of the first row in the result set returned by the query. Additional columns or rows are ignored.

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- VB.NET & ExecuteScalar()

Example

ExecuteScalar.aspx

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

Dim objConn As System.Data.OleDb.OleDbConnection
Dim objCmd As System.Data.OleDb.OleDbCommand
Dim strConnString,strSQL As String
Dim myScalar As Object

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="&Server.MapPath("database/mydatabase.mdb")&";Jet OLEDB:Database Password=;"
objConn = New System.Data.OleDb.OleDbConnection(strConnString)
objConn.Open()

strSQL = "SELECT MAX(Used) FROM customer"

objCmd = New System.Data.OleDb.OleDbCommand()
With objCmd
.Connection = objConn
.CommandType = CommandType.Text
.CommandText = strSQL
End With

myScalar = objCmd.ExecuteScalar()

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

</script>

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Category: VB.NET & ADO.NET by admin