How can I pass empty textboxes

Question

I have 5 textbox. I want to put all 4 textbox text in 5th textbox. I can do it, but when any textbox was null ,I had an error. Some textboxes will be empty. How can I do this without error.

Vulpes · Answer

Well, a TextBox's Text property can only be null if you assign null to it using code. Otherwise it's default value is an empty string and so this will be the value it has if the user doesn't fill it. To allow for that possibility or that the user may fill the TextBox with several spaces, try the following code instead: TextBox[] tba = new TextBox[]{Textbox1, Textbox2, Textbox3, Textbox4}; string temp = ""; foreach(TextBox tb in tba) { if (tb.Text != null && tb.Text.Trim().Length > 0) { temp += tb.Text.Trim() + " "; } } Textbox5.Text = temp.TrimEnd();

Pankaj Kumar Choudhary · Answer

You can try this code textBox5.Text = (textBox1.Text.Length > 0) ? textBox1.Text : " " ; textBox5.Text += (textBox2.Text.Length > 0) ? textBox1.Text : " " ; textBox5.Text += (textBox3.Text.Length > 0) ? textBox1.Text : " " ; textBox5.Text += (textBox4.Text.Length > 0) ? textBox1.Text : " " ; textBox5.Text=textBox5.Text.Trim();

Afzaal Ahmad Zeeshan · Answer

Then you can test for their values like this, if(textBox1.Text != null && textBox2.Text != null && textBox3.Text != null) { // value is not null } I have tested only 3, you can add the fourth condition too. This way, the code would only execute if the value is not null, I am using AND operator. Which evaluates only and only if all of the conditions are true.

Amar Srivastava · Answer

Subhashkumar Yadav · Answer

Use this code:- if (string.IsNullOrEmpty(textBox1.Text) == true) { //Your TextBox is Empty or Null } else { //Your TextBox having some value }

Gowtham Rajamanickam · Answer

string temp = (Textbox1.Text == null) ? "" : TextBox1.Text + " "; temp += (Textbox2.Text == null) ? "" : Textbox2.Text + " "; temp += (Textbox3.Text == null) ? "" : Textbox3.Text + " "; temp += (Textbox4.Text == null) ? "" : Textbox4.Text; Textbox5.Text = temp.Trim();

Artur Vahe Karapekmez · Answer

Thid ode can work only all textboxes when fill. I want to pass some textboxes null

Vulpes · Answer

Try this: string temp = (Textbox1.Text == null) ? "" : TextBox1.Text + " "; temp += (Textbox2.Text == null) ? "" : Textbox2.Text + " "; temp += (Textbox3.Text == null) ? "" : Textbox3.Text + " "; temp += (Textbox4.Text == null) ? "" : Textbox4.Text; Textbox5.Text = temp.Trim();

Artur Vahe Karapekmez · Answer

Can you write an example code;

Khargesh Rajput · Answer

For.null.text use null.string Textbox2.text=" ";

Artur Vahe Karapekmez · Answer

Hello, My question is for example; Textbox1.Text ="Hello"; Textbox2.Text =null; Textbox3.Text ="World"; Textbox4.Text = null; when textboxes like that; Textbox5.Text= Hello World; How can I do This.(Not allways Textbos2 and 4 will be null it will be empty according to users but at least 1 textbox will be not null.