在Datagridview控件中驗證/禁用日歷列的日期

Question

您能否建議在datagridview控件中禁用“日歷”列中的日期。以下是要求

 -> User is not allowed to select a date which is less than today's date and the next 1 month dates. Example - Today's Date - **Sep 12th 2014** Now all the dates less than Sep12th,2014 are disabled and the dates till **Oct12,2014** ie till next month are disabled. So user is allowed to select the dates only after Oct12th,2014. --> When the calendar column is added to the Datagrid..it must already show the dates from next month.As per above example from 

2014年10月13日。

您能否就我如何實現這一目標提出建議。

謝謝，Prathap

Answer 1

希望這會幫助您入門。 我設置了一個datagridview，其中一個名為“ Date”的列在每一行中列出了不同的日期。 為了弄清楚要設置為只讀的日期，我使用以下代碼：

Dim myDate As Date = Date.Today
Dim rowNumber As Integer = 0
Dim rowDate As Date = Nothing
Dim enabledDate As Date = myDate.AddDays(30)

Do Until rowDate = enabledDate
    rowDate = DataGridView1.Rows(rowNumber).Cells(0).Value

    If rowDate < enabledDate Then
        DataGridView1.Rows(rowNumber).Cells(0).ReadOnly = True
        DataGridView1.Rows(rowNumber).Cells(0).Style.ForeColor = Color.Gray
    Else
        DataGridView1.Rows(rowNumber).Cells(0).ReadOnly = False
        DataGridView1.Rows(rowNumber).Cells(0).Style.ForeColor = Color.Black
    End If

    rowNumber = rowNumber + 1
Loop

設置方式雖然您需要根據當月的月份用不同的值填充“ enabledDate”。 對於本月，您將增加30天，但下個月將需要31天。

希望這可以幫助。