执行存储过程OnClick

Question

如何在不带参数的OnClick按钮上执行存储过程？我背后有下面的代码：

Protected Sub btnExport_Click(sender As Object, e As System.EventArgs) Handles btnExport.Click 

     Dim exec As SqlCommand = New SqlCommand("up_ExportFile", conn) 
     exec.CommandType = CommandType.StoredProcedure 

End Sub 

Answer 1

假设你已经打开的连接只需添加ExecuteNonQuery方法

Protected Sub btnExport_Click(sender As Object, e As System.EventArgs) Handles btnExport.Click 

     Dim exec As SqlCommand = New SqlCommand("up_ExportFile", conn) 
     exec.CommandType = CommandType.StoredProcedure 
     exec.ExecuteNonQuery() 

End Sub 

不过我建议你不要保持一个全局变量牵着你的SqlConnection打开寿命的应用程序。请记住，SqlServer的ADO.NET提供程序实现了connection pooling mechanism，因此，打开一个连接是一个轻量级过程。
所以，更好的方法是

Using conn = new SqlConnection("your_connection_string_here") 
    conn.Open() 
    Dim exec As SqlCommand = New SqlCommand("up_ExportFile", conn) 
    exec.CommandType = CommandType.StoredProcedure 
    exec.ExecuteNonQuery() 
End Using 

这样只需要时，再关闭和设置 See Using Statememt