大家好！
最近碰到一个麻烦，我用vb.net的设计界面时，控件datagrid显示的数据不能完全显示，所以需要改变每列的宽度。我原来是这样做的，请大家指点指点。
  Private Sub ShowDataToGrid()
        Dim Bloom_DataTable As DataTable = New DataTable("Bloom_DataTable")
        Dim Bloom_DataSet As New DataSet
        Dim MyDataRow As DataRow
        Creat_Table(Bloom_DataTable)
        OCusers = New Cusers
        OCusers.Requery(OCusers)
        Dim i As Integer = OCusers.Count
        For Each OCuser In OCusers
            MyDataRow = Bloom_DataTable.NewRow
            MyDataRow("用户编号") = OCuser.log_code
            MyDataRow("用户名称") = OCuser.user_name
            MyDataRow("用户等级") = OCuser.user_level
            MyDataRow("用户简介") = OCuser.user_description
            MyDataRow("所属班组") = OCuser.belong_group
            Bloom_DataTable.Rows.Add(MyDataRow)
        Next
        Bloom_DataSet.Tables.Add(Bloom_DataTable)
        Grd_primarydata.SetDataBinding(Bloom_DataSet, "Bloom_DataTable")
end sub
  Private Sub Creat_Table(ByVal mydatatable As DataTable)

        Dim myDataColumn As DataColumn

        myDataColumn = New DataColumn
        myDataColumn.DataType = System.Type.GetType("System.String")
        myDataColumn.ColumnName = "用户编号"
        myDataColumn.ReadOnly = True
        mydatatable.Columns.Add(myDataColumn)

        myDataColumn = New DataColumn
        myDataColumn.DataType = System.Type.GetType("System.String")
        myDataColumn.ColumnName = "用户名称"
        myDataColumn.ReadOnly = True
        mydatatable.Columns.Add(myDataColumn)


        myDataColumn = New DataColumn
        myDataColumn.DataType = System.Type.GetType("System.Int32")
        myDataColumn.ColumnName = "用户等级"
        myDataColumn.ReadOnly = True
        mydatatable.Columns.Add(myDataColumn)

        myDataColumn = New DataColumn
        myDataColumn.DataType = System.Type.GetType("System.String")
        myDataColumn.ColumnName = "用户简介"
        myDataColumn.ReadOnly = True
        mydatatable.Columns.Add(myDataColumn)

        myDataColumn = New DataColumn
        myDataColumn.DataType = System.Type.GetType("System.String")
        myDataColumn.ColumnName = "所属班组"
        myDataColumn.ReadOnly = True
        mydatatable.Columns.Add(myDataColumn)
    End Sub
但在过程Creat_Table中不能修改myDataColumn的宽度
于是采用对datagrid的tablestyles属性设置，gridcolumnstyles都已设置好标题和宽度，为什么运行连每列的标题都不显示，是不是还要在程序中添加代码处理？？？
特来请教大家，谢谢！！！