在代码的一半处使用当前子项退出调用子项 [英] exit a calling sub using current sub at half of a code

问题描述

我使用的是2008年..
我在vb.net中创建Windows窗体应用程序
我需要帮助...如果我使用
退出子check_fill_for_New() 退出子，然后在bt_Ok_Click子中不触发msgbox……但它也会退出一半.

i used vs 2008..
i create a windows form application in vb.net
i want help in which ... if i exit a sub check_fill_for_New() using
EXIT SUB then in bt_Ok_Click sub not fire a msgbox......but it will also EXIT at half.

Public Sub check_fill_for_New()
 If tb_UserName.Text = "" Then
  MsgBox("Please Insert User Name Field", MsgBoxStyle.OkOnly, "Error")
  tb_UserName.Focus()
  Exit Sub
 End If
End Sub 

Private Sub bt_Ok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bt_Ok.Click
 If maintain_department = "Admin" Then
  Call check_fill_for_New()
  MsgBox("nooooooooo")
 End If
End Sub

推荐答案

将check_fill_for_New()转换为一个返回布尔值的函数，并在bt_Ok_Click中在消息之前检查是否为true或false.例如:

Convert check_fill_for_New() into a function that returns a boolean and in bt_Ok_Click check for true or false before message. For example:

Public function check_fill_for_New() as boolean
 If tb_UserName.Text = "" Then
  MsgBox("Please Insert User Name Field", MsgBoxStyle.OkOnly, "Error")
  tb_UserName.Focus()
  return false
 else
  return true
 end if
End Sub 

Private Sub bt_Ok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bt_Ok.Click
 If maintain_department = "Admin" Then
  if (check_fill_for_New()) then
   MsgBox("nooooooooo")
  end if
 End If
End Sub

您可以使用此代码

you can use this code

Public Function check_fill_for_New()
    If tb_UserName.Text = "" Then
        MessageBox.Show("Please Insert User Name Field", "Error", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1)
        tb_UserName.Focus()
        Return "False"
    Else
        Return "True"
    End If
End Function

Private Sub bt_Ok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bt_Ok.Click
    If maintain_department = "Admin" Then
        If check_fill_for_New() Then
            MessageBox.Show("Nooooooooo", "Invalid Username or Password")
        End If
    End If
End Sub

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