Question

我想让我的Gridview控件根据条件显示各种颜色。一个人有一个约会的日期。我希望当一天到来时gridview显示绿色。我希望日期从到期日起过去一天时显示为红色，而在医疗日期前7天显示为橙色。我只设法将其修复为可显示当天医疗状况的绿色，但在其他情况下我遇到了困难。

这是我目前拥有的。当我根据到期日和当前日期相等将行更改为绿色时，If语句的第一部分起作用，但是我不知道如何为上述其他条件设置if语句。请协助

 If e.Row.RowType = DataControlRowType.DataRow Then


            Dim row As DataRow = (CType(e.Row.DataItem, DataRowView)).Row
            Dim DueDate As DateTime = row.Field(Of DateTime)(7)

            If DueDate.Date = DateTime.Today Then

                e.Row.Cells(0).BackColor = System.Drawing.Color.Green
                e.Row.Cells(0).ForeColor = System.Drawing.Color.White

                e.Row.Cells(1).BackColor = System.Drawing.Color.Green
                e.Row.Cells(1).ForeColor = System.Drawing.Color.White

                e.Row.Cells(2).BackColor = System.Drawing.Color.Green
                e.Row.Cells(2).ForeColor = System.Drawing.Color.White

                e.Row.Cells(3).BackColor = System.Drawing.Color.Green
                e.Row.Cells(3).ForeColor = System.Drawing.Color.White

                e.Row.Cells(4).BackColor = System.Drawing.Color.Green
                e.Row.Cells(4).ForeColor = System.Drawing.Color.White

                e.Row.Cells(5).BackColor = System.Drawing.Color.Green
                e.Row.Cells(5).ForeColor = System.Drawing.Color.White

                e.Row.Cells(6).BackColor = System.Drawing.Color.Green
                e.Row.Cells(6).ForeColor = System.Drawing.Color.White

                e.Row.Cells(7).BackColor = System.Drawing.Color.Green
                e.Row.Cells(7).ForeColor = System.Drawing.Color.White

                e.Row.Cells(8).BackColor = System.Drawing.Color.Green
                e.Row.Cells(8).ForeColor = System.Drawing.Color.White

                e.Row.Cells(9).BackColor = System.Drawing.Color.Green
                e.Row.Cells(9).ForeColor = System.Drawing.Color.White

                e.Row.Cells(10).BackColor = System.Drawing.Color.Green
                e.Row.Cells(10).ForeColor = System.Drawing.Color.White

                e.Row.Cells(11).BackColor = System.Drawing.Color.Green
                e.Row.Cells(11).ForeColor = System.Drawing.Color.White

                e.Row.Cells(12).BackColor = System.Drawing.Color.Green
                e.Row.Cells(12).ForeColor = System.Drawing.Color.White

                e.Row.Cells(13).BackColor = System.Drawing.Color.Green
                e.Row.Cells(13).ForeColor = System.Drawing.Color.White


            ElseIf Day(DateTime.Now) > 1 Then


                e.Row.Cells(0).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(0).ForeColor = System.Drawing.Color.White

                e.Row.Cells(1).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(1).ForeColor = System.Drawing.Color.White

                e.Row.Cells(2).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(2).ForeColor = System.Drawing.Color.White

                e.Row.Cells(3).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(3).ForeColor = System.Drawing.Color.White

                e.Row.Cells(4).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(4).ForeColor = System.Drawing.Color.White

                e.Row.Cells(5).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(5).ForeColor = System.Drawing.Color.White

                e.Row.Cells(6).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(6).ForeColor = System.Drawing.Color.White

                e.Row.Cells(7).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(7).ForeColor = System.Drawing.Color.White

                e.Row.Cells(8).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(8).ForeColor = System.Drawing.Color.White

                e.Row.Cells(9).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(9).ForeColor = System.Drawing.Color.White

                e.Row.Cells(10).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(10).ForeColor = System.Drawing.Color.White

                e.Row.Cells(11).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(11).ForeColor = System.Drawing.Color.White

                e.Row.Cells(12).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(12).ForeColor = System.Drawing.Color.White

                e.Row.Cells(13).BackColor = System.Drawing.Color.Orange
                e.Row.Cells(13).ForeColor = System.Drawing.Color.White

            End If

        End If

Answer 1

您可以按如下所示使用方法后面的代码：

像这样在GridView中添加模板列：

<asp:TemplateField HeaderText="Due Date">
    <ItemTemplate>
        <asp:Label ID="Label4" runat="server" Text='<%# Eval("DueDate") %>'
            Style='<%# GetColorStyles(0, Eval("DueDate"))%>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>

，并对每个单元格使用以下方法：

Function GetColorStyles(ByVal cellindex As String, ByVal DueDate As DateTime) As String
    Dim RES As String = "color:#000000" 'default color
    If DueDate.Date = DateTime.Today Then
        RES = "color:#00FF00"
    ElseIf Day(DateTime.Now) > 1 Then
        RES = "color:#FF0000;"
    End If
    Return RES
End Function

Answer 2

使用for循环0到13并删除重复项
要获取7天后的日期并检查是否更早，请与date.Now.addDays(7)
要检查日期是否过去，请使用date.Now.addDays(-1)

Answer 3

如果必须使整个行的颜色相同，则不需要按单元格着色。请使用。

   e.Row.BackColor = System.Drawing.Color.Green;
   e.Row.ForeColor = System.Drawing.Color.White;

如何根据日期值对Gridview进行颜色编码

3 个答案: