How can I pass empty textboxes

Artur Vahe Karapekmez

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.

11 Replies

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Amar Srivastava9y ago
var text1 = string.IsNullOrEmpty(Textbox1.Text) ? "" : TextBox1.Text;
var text2 = string.IsNullOrEmpty(Textbox2.Text) ? "" : TextBox2.Text;
var text3 = string.IsNullOrEmpty(Textbox3.Text) ? "" : TextBox3.Text;
var text4 = string.IsNullOrEmpty(Textbox4.Text) ? "" : TextBox4.Text;

Textbox5.Text = string.format("{0} {1} {2} {3}",text1,text2,text3,text4);

//Formatting is yours of the text according to your need
+2
Subhashkumar Yadav9y ago
Use this code:-

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

+2
Gowtham Rajamanickam11y ago
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();
+2
Vulpes11y ago
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();

+4
Pankaj Kumar Choudhary11y ago
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();
+3
Artur Vahe Karapekmez11y ago
Thid ode can work only all textboxes when fill. I want to pass some textboxes null
+2
Vulpes11y ago
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();
+2
Artur Vahe Karapekmez11y ago
Can you write an example code;
+2
Khargesh Rajput11y ago
For.null.text use null.string
Textbox2.text=" ";
+2
Artur Vahe Karapekmez11y ago
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.
+2
Afzaal Ahmad Zeeshan11y ago
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.
+2