空白文本框 [英] Blank TextBox

问题描述

嗨
我在C#Windows应用程序中有3个TextBox es和1个Button.
如果用户单击Button，则我检查是否有任何TextBox为空，然后使用
MessageBox.Show("You cannot use a blank TextBox")，并在自动将焦点设置为空白后TextBox
我这样做，但是我没有将焦点放在空白TextBox中.那我该怎么办?
请帮帮我

在此先感谢

[修改:删除每个单词的首字母大写，并尝试使其更具可读性.]

Hi
I have three TextBoxes in C# Windows Application and one Button.
If user clicks a Button then I check if any TextBox is empty, then I use
MessageBox.Show("You cannot use a blank TextBox") and after automatic set focus in blank TextBox
I do this but I do not set focus in blank TextBox. So what do I need to do?
Please help me

Thanks in advance

[Modified: removed capitalization on the first letter of every word and tried to make it more readable.]

推荐答案

this.textBox1.Focus();

您真的需要显示一个消息框吗?
消息框的目的仅仅是传达错误/警告，如果是，那么我认为您可以使用错误提供程序控件.
尝试以下链接:

• http://www.c-sharpcorner.com/UploadFile/DipalChoksi UsingErrorProviderContolinWindowsFormsandCSharp11242005010829AM/UsingErrorProviderContolinWindowsFormsandCSharp.aspx []
• http://www.developerfusion.com /code/4445/userfriendly-validation-using-errorprovider/ [

Do you really need to show a messagebox.
Is the purpose of messagebox is just to convey the error/warning, if Yes then I think you can use errorprovider control.
Try these links:

• http://www.c-sharpcorner.com/UploadFile/DipalChoksi/UsingErrorProviderContolinWindowsFormsandCSharp11242005010829AM/UsingErrorProviderContolinWindowsFormsandCSharp.aspx[^]
• http://www.developerfusion.com/code/4445/userfriendly-validation-using-errorprovider/[^]
  

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