show message box for those textboxes which are empty

Question

I've some textboxes in my win form. On submit button I want to check if all the textboxes are filled or not. I want to show message for only those textboxes which are empty.

For eg.

First Name >> txtbox_FirstName

Last Name >> txtbox_LastName

Middle Name >> txtbox_MiddleName

Address >> txtbox_Address

Class >> txtbox_Class

private void btnSubmit_Click(object sender, EventArgs e)

{

if (txtbox_FirstName.Text == "" || txtbox_LastName.Text == "" || txtbox_MiddleName.Text == "" || txtbox_Address.Text == "" || txtbox_Class.Text == "")

{

MessageBox.Show( MessageBoxButtons.OK, MessageBoxIcon.Information);

// focus on the empty text boxes

}

In the message box I want to say to the user, please fill the text box which is empty.

Suppose, if the user has not fill txtbox_LastName, the message should be "please enter Last Name"

if the user has not fill txtbox_FirstName and txtbox_Class, the message should be "please enter First Name and Class".

And also focus on the first empty text box.

How can I do that?

Govinda Rajulu Yemineni · Answer

Hi private void btnSubmit_Click( object sender EventArgs e) { string result = Please Enter  ; if (txtbox_FirstName.Text == string .Empty) { result += First Name ; } if (txtbox_LastName.Text == string .Empty) { result += Last Name ; } if (txtbox_MiddleName.Text == string .Empty) { result += Middle Name ; } if (txtbox_Address.Text == string .Empty) { result += Address ; } if (txtbox_Class.Text == string .Empty) { result += Class ; } el s e { if (result.Contains( '' )) { result = result.Remove(result.LastIndexOf( '' )); } } if (result!= Please Enter  ) { MessageBox.Show(result); } }

Ranjit Powar · Answer

if (txtbox_FirstName.Text == ) { MessageBox.Show(Please enter First Name!); txtbox_FirstName.Focus(); } else if (txtbox_LastName.Text == ) { MessageBox.Show(Please enter Last Name!); (txtbox_LastName.Focus(); } else if (txtbox_MiddleName.Text == ) { MessageBox.Show(Please enter Middle Name!); txtbox_MiddleName.Focus() } else if (txtbox_Address.Text == ) { MessageBox.Show(Please enter Address!); txtbox_Address.Focus(); } else if (txtbox_Class.Text == ) { MessageBox.Show(Please enter Class!); txtbox_Class.Focus(); }

Vilas Shende · Answer

Dude @Hadoop Hadoop I have suggested code for Windows Desktop Application itself.

Manoj Bhoir · Answer

Hi Instead of your code : if (txtbox_FirstName.Text ==  || txtbox_LastName.Text ==  || txtbox_MiddleName.Text ==  || txtbox_Address.Text ==  || txtbox_Class.Text == ) { MessageBox.Show( MessageBoxButtons.OK MessageBoxIcon.Information); // focus on the empty text boxes } Try this : if (txtbox_FirstName.Text == ) { MessageBox.Show(Please enter First Name!); } else if (txtbox_LastName.Text == ) { MessageBox.Show(Please enter Last Name!); } else if (txtbox_MiddleName.Text == ) { MessageBox.Show(Please enter Middle Name!); } else if (txtbox_Address.Text == ) { MessageBox.Show(Please enter Address!); } else if (txtbox_Class.Text == ) { MessageBox.Show(Please enter Class!); } else { // Your code if all fields validated successfully. }

Rakesh · Answer

http://www.codeproject.com/Articles/13922/Validate-user-input-in-Windows-Forms

hadoop hadoop · Answer

Thanks for the reply. But I need solution for C# desktop application.

Vilas Shende · Answer

Hi Your code is okay just you have to increase number of conditions for each & every text box condition should be separate. For examples:- First Name >> txtbox_FirstName Last Name >> txtbox_LastName Middle Name >> txtbox_MiddleName Address >> txtbox_Address Class >> txtbox_Class private void btnSubmit_Click(object sender EventArgs e) { if (txtbox_FirstName.Text == ) { MessageBox.Show(Please enter First Name); } if (txtbox_LastName.Text == ) { MessageBox.Show(Please enter Last Name); } if (txtbox_MiddleName.Text == ) { MessageBox.Show(Please enter Middle Name); } if (txtbox_Address.Text == ) { MessageBox.Show(Please enter Address); } if (txtbox_Class.Text == ) { MessageBox.Show(Please enter Class); } }