为什么RowPrePaint在所有内容之上，我该如何改变它？

在我构建应用程序时，由于使用了RowPrePaint我遇到了一些问题。 无论代码执行的顺序如何，事件似乎都粘贴在所有内容之上。

我有一个问题，细胞工具提示会在它下面; 我不得不找到一种完全不同的方法来传达细胞的文本。 现在我只是试图显示一个消息框，如果我的If语句不符合，但即使这样也不会显示，除非用户按下Alt键（我已通过关闭并再次运行代码进行检查）。

所以我的问题是为什么RowPrePaint事件将自己置于一切之上并且有没有办法在不将代码移动到cellformatting事件的情况下改变它？ 提前致谢。

我在下面包含了我的if语句，但我知道代码本身不是问题。

  Dim RSScon As New SqlClient.SqlConnection("ConnectionString") Dim cmd As New SqlCommand("SELECT Comment FROM StepBackTable WHERE Retsch_ID = '" & Convert.ToInt32(DataGridView1.Rows(rowindex).Cells(0).Value) & "' AND Col_index = '" & Convert.ToInt32(columnindex) & "';", RSScon) Dim Rdr_Info As SqlDataReader RSScon.Open() Rdr_Info = cmd.ExecuteReader(CommandBehavior.Default) If Rdr_Info.HasRows Then While Rdr_Info.Read() ViewComForm.Show() ViewComForm.TextBox1.Text = Rdr_Info("Comment") End While Else MessageBox.Show("There are no comments assiated with this stage of the job", "Important Note", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1) End If Rdr_Info.Close() cmd.Dispose() RSScon.Close() 

编辑：TaW的RowPrePaint代码

  For colval1 As Integer = 5 To 28 If Convert.ToInt32(DataGridView1.Rows(e.RowIndex).Cells(29).Value) = 1 Or Convert.ToInt32(DataGridView1.Rows(e.RowIndex).Cells(29).Value) = 5 Then DataGridView1.Rows(e.RowIndex).Cells(colval1).Value = 2 DataGridView1.Rows(e.RowIndex).Cells(29).Value = 1 ElseIf Convert.ToInt32(DataGridView1.Rows(e.RowIndex).Cells(29).Value) = 4 Then DataGridView1.Rows(e.RowIndex).Cells(colval1).Value = 4 DataGridView1.Rows(e.RowIndex).Cells(29).Value = 4 End If Next colval1 If DataGridView1.Rows(e.RowIndex).Cells(3).Value = 7 Then DataGridView1.Rows(e.RowIndex).Cells(0).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(1).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(2).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(3).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(4).Style.BackColor = Color.LightSkyBlue ElseIf DataGridView1.Rows(e.RowIndex).Cells(3).Value = 8 Then DataGridView1.Rows(e.RowIndex).Cells(0).Style.ForeColor = Color.White DataGridView1.Rows(e.RowIndex).Cells(1).Style.ForeColor = Color.White DataGridView1.Rows(e.RowIndex).Cells(2).Style.ForeColor = Color.White DataGridView1.Rows(e.RowIndex).Cells(3).Style.ForeColor = Color.White DataGridView1.Rows(e.RowIndex).Cells(4).Style.ForeColor = Color.White End If Dim value As Integer = Convert.ToInt32(DataGridView1.Rows(e.RowIndex).Cells(5).Value) Select Case value Case "0" DataGridView1.Rows(e.RowIndex).Cells(5).Style.BackColor = Color.Empty DataGridView1.Rows(e.RowIndex).Cells(5).Style.ForeColor = Color.White Case "1" DataGridView1.Rows(e.RowIndex).Cells(0).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(1).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(2).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(4).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(5).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(5).Style.ForeColor = Color.LightSkyBlue Case "2" DataGridView1.Rows(e.RowIndex).Cells(0).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(1).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(2).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(4).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(5).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(5).Style.ForeColor = Color.Chartreuse Case "4" DataGridView1.Rows(e.RowIndex).Cells(0).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(1).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(2).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(4).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(5).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(5).Style.ForeColor = Color.Red Case "5" DataGridView1.Rows(e.RowIndex).Cells(0).Style.BackColor = Color.RoyalBlue DataGridView1.Rows(e.RowIndex).Cells(1).Style.BackColor = Color.RoyalBlue DataGridView1.Rows(e.RowIndex).Cells(2).Style.BackColor = Color.RoyalBlue DataGridView1.Rows(e.RowIndex).Cells(4).Style.BackColor = Color.RoyalBlue DataGridView1.Rows(e.RowIndex).Cells(5).Style.BackColor = Color.RoyalBlue DataGridView1.Rows(e.RowIndex).Cells(5).Style.ForeColor = Color.RoyalBlue End Select For colval As Integer = 6 To 28 Dim value6 As Integer = DataGridView1.Rows(e.RowIndex).Cells(colval).Value Select Case value6 Case "0" DataGridView1.Rows(e.RowIndex).Cells(colval).Style.BackColor = Color.Empty DataGridView1.Rows(e.RowIndex).Cells(colval).Style.ForeColor = Color.White Case "1" DataGridView1.Rows(e.RowIndex).Cells(colval).Style.BackColor = Color.LightSkyBlue DataGridView1.Rows(e.RowIndex).Cells(colval).Style.ForeColor = Color.LightSkyBlue Case "2" DataGridView1.Rows(e.RowIndex).Cells(colval).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(colval).Style.ForeColor = Color.Chartreuse Case "3" DataGridView1.Rows(e.RowIndex).Cells(colval).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(colval).Style.ForeColor = Color.Red Case "4" DataGridView1.Rows(e.RowIndex).Cells(colval).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(colval).Style.ForeColor = Color.Red Case "5" DataGridView1.Rows(e.RowIndex).Cells(colval).Style.BackColor = Color.RoyalBlue DataGridView1.Rows(e.RowIndex).Cells(colval).Style.ForeColor = Color.RoyalBlue End Select Next colval Dim value29 As Integer = DataGridView1.Rows(e.RowIndex).Cells(29).Value Select Case value29 Case "0" DataGridView1.Rows(e.RowIndex).Cells(29).Style.BackColor = Color.Empty DataGridView1.Rows(e.RowIndex).Cells(29).Style.ForeColor = Color.White Case "1" DataGridView1.Rows(e.RowIndex).Cells(29).Style.BackColor = Color.Chartreuse DataGridView1.Rows(e.RowIndex).Cells(29).Style.ForeColor = Color.Chartreuse Case "4" DataGridView1.Rows(e.RowIndex).Cells(29).Style.BackColor = Color.Red DataGridView1.Rows(e.RowIndex).Cells(29).Style.ForeColor = Color.Red End Select If DataGridView1.Rows(e.RowIndex).Cells(7).Value = 5 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 8 Then DataGridView1.Rows(e.RowIndex).Cells(9).Value = 5 DataGridView1.Rows(e.RowIndex).Cells(8).Value = 5 End If If DataGridView1.Rows(e.RowIndex).Cells(10).Value = 5 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 8 Then DataGridView1.Rows(e.RowIndex).Cells(11).Value = 5 DataGridView1.Rows(e.RowIndex).Cells(12).Value = 5 End If If DataGridView1.Rows(e.RowIndex).Cells(13).Value = 5 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 8 Then DataGridView1.Rows(e.RowIndex).Cells(14).Value = 5 DataGridView1.Rows(e.RowIndex).Cells(15).Value = 5 DataGridView1.Rows(e.RowIndex).Cells(16).Value = 5 End If If DataGridView1.Rows(e.RowIndex).Cells(22).Value = 5 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 8 Then DataGridView1.Rows(e.RowIndex).Cells(23).Value = 5 End If If DataGridView1.Rows(e.RowIndex).Cells(27).Value = 5 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 8 Then DataGridView1.Rows(e.RowIndex).Cells(29).Value = 1 End If If DataGridView1.Rows(e.RowIndex).Cells(9).Value = 1 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 7 Then DataGridView1.Rows(e.RowIndex).Cells(10).Value = 1 End If If DataGridView1.Rows(e.RowIndex).Cells(12).Value = 1 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 7 Then DataGridView1.Rows(e.RowIndex).Cells(13).Value = 1 End If If DataGridView1.Rows(e.RowIndex).Cells(19).Value = 1 And DataGridView1.Rows(e.RowIndex).Cells(3).Value = 7 Then DataGridView1.Rows(e.RowIndex).Cells(20).Value = 1 End If