使用组合框更改图像的颜色，然后将数据保存到数据网格视图中

Question

我能够使用combobox中输入的文本i更改图像的后色，但是当我将该数据保存在数据网格中时，背面颜色不会更改。

这是我的代码：

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        On Error GoTo SaveErr
        MachineHistoryBindingSource.EndEdit()
        Machine_HistoryTableAdapter.Update(HistoryDataSet.Machine_History)
        MessageBox.Show("OK Complete")
    SaveErr:
        Exit Sub
        Dim tempcolor4 As String
        Dim tempcolor1 As String
        tempcolor4 = ComboBox4.Text
        tempcolor1 = ComboBox1.Text
        If tempcolor4.Equals("Running") And tempcolor1.Equals("1") Then
            Form2.PictureBox15.BackColor = Color.Green
        ElseIf tempcolor4.Equals("Stop") And tempcolor1.Equals("1") Then
            Form2.PictureBox15.BackColor = Color.Red
            ComboBox1.SelectedIndex = -1
            ComboBox4.SelectedIndex = -1
    End Sub
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'HistoryDataSet.Machine_History' table. You can move, or remove it, as needed.
        Me.Machine_HistoryTableAdapter.Fill(Me.HistoryDataSet.Machine_History)
        'TODO: This line of code loads data into the 'HistoryDataSet.Machine_History' table. You can move, or remove it, as needed.
        Me.Machine_HistoryTableAdapter.Fill(Me.HistoryDataSet.Machine_History)
        'TODO: This line of code loads data into the 'HistoryDataSet.Machine_History' table. You can move, or remove it, as needed.
        Me.Machine_HistoryTableAdapter.Fill(Me.HistoryDataSet.Machine_History)
    End Sub
    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        MachineHistoryBindingSource.MovePrevious()
    End Sub
    Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
        MachineHistoryBindingSource.AddNew()
    End Sub
    Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
        MachineHistoryBindingSource.MoveNext()
    End Sub
    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Form15.Show()
    End Sub
    Private Sub Button6_Click(sender As Object, e As EventArgs) Handles Button6.Click
        Me.Close()
    End Sub
End Class

Answer 1

您要在设置颜色之前退出该方法。

On Error GoTo SaveErr
        MachineHistoryBindingSource.EndEdit()
        Machine_HistoryTableAdapter.Update(HistoryDataSet.Machine_History)
        MessageBox.Show("OK Complete")
    SaveErr:
        Exit Sub '<--- Right here

在vb.net中，我们进行了结构化错误处理... catch ...最后...结束尝试

Try
    MachineHistoryBindingSource.EndEdit()
    Machine_HistoryTableAdapter.Update(HistoryDataSet.Machine_History)
    MessageBox.Show("OK Complete")
Catch ex As Exception
     MessageBox.Show(ex.Message)
     Exit Sub
End Try