本文整理汇总了VB.NET中System.Data.Common.DbConnectionStringBuilder.TryGetValue方法的典型用法代码示例。如果您正苦于以下问题：VB.NET DbConnectionStringBuilder.TryGetValue方法的具体用法？VB.NET DbConnectionStringBuilder.TryGetValue怎么用？VB.NET DbConnectionStringBuilder.TryGetValue使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.Common.DbConnectionStringBuilder的用法示例。
在下文中一共展示了DbConnectionStringBuilder.TryGetValue方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: Main
Sub Main()
Dim builder As New DbConnectionStringBuilder
builder.ConnectionString = _
"Provider=sqloledb;Data Source=192.168.168.1,1433;" & _
"Network Library=DBMSSOCN;Initial Catalog=pubs;" & _
"Integrated Security=SSPI;"
' Call TryGetValue method for multiple
' key names.
DisplayValue(builder, "Provider")
DisplayValue(builder, "DATA SOURCE")
DisplayValue(builder, "InvalidKey")
DisplayValue(builder, Nothing)
Console.ReadLine()
End Sub
Private Sub DisplayValue( _
ByVal builder As DbConnectionStringBuilder, ByVal key As String)
Dim value As Object
' Although TryGetValue handles missing keys,
' it doesn't handle passing in a null (Nothing in Visual Basic)
' key. This example traps for that particular error, but
' bubbles any other unknown exceptions back out to the
' caller.
Try
If builder.TryGetValue(key, value) Then
Console.WriteLine("{0}={1}", key, value)
Else
Console.WriteLine("Unable to retrieve value for '{0}'", key)
End If
Catch ex As ArgumentNullException
Console.WriteLine("Unable to retrieve value for null key.")
End Try
End Sub