datacolumn数据类型datetime吗? [英] datacolumn datatype datetime ?

问题描述

Dim ds as new DataSet
dim bs as new BindingSourse
Dim dt As New DataTable("Test")


Dim dob As New DataColumn("dob", System.Type.GetType("System.DateTime"))'' I try to do it, but it seem this code does''t work  
dt.Columns.Add(dob)
ds.Tables.Add(dt)

  bs.DataSource = ds.Tables("Test")
Textbox1.DataBindings.Add("Value", bs, "dob")

请帮帮我.

感谢

help me please.

thanks

推荐答案

让我们从最基本的东西开始:

不要使用System.Type.GetType("System.DateTime");使用typeof(System.DateTime).

您如何认为第一种情况是可维护的?如果您输错类型名​​称该怎么办?编译器将无法对其进行检查.通常，使用任何立即常量(例如"System.DateTime")(0、1或null之类的东西除外)对于维护都是非常不利的，甚至不应使用"，而应使用string.Empty.

—SA

Let''s start from the very elementary things:

Don''t use System.Type.GetType("System.DateTime"); use typeof(System.DateTime).

How can you consider the first case maintainable? What if you mistype the type name? The compiler won''t be able to check it up. Generally, using any immediate constants like your "System.DateTime" (except something like 0, 1 or null) is very bad for maintenance, even "" should not be used — use string.Empty instead.

—SA

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