How to Run the dynamic code in TextBox ?

Question

Hi all,

I need something to know please help me.

Can I use the code in textbox??
For Ex:

I have a textbox (Name: code) to write the code and two other to enter values.

I write these in my first textbox :

Convert.ToDouble(value1.Text)+ Convert.ToDouble(value2.Text);

and when i click the button I want it to be calculated. and see the result as a string on a laber or whatever.

I read soo much articles but still I cant do it. Please help me. Thanks to all.

Frogleg · Answer

Like this ? private void textBox1_TextChanged(object sender, EventArgs e) { if (textBox2.Text != string.Empty) { double d = Convert.ToDouble(textBox1.Text) + Convert.ToDouble(textBox2.Text); label1.Text = d.ToString(); } } private void textBox2_TextChanged(object sender, EventArgs e) { if (textBox1.Text != string.Empty) { double d = Convert.ToDouble(textBox1.Text) + Convert.ToDouble(textBox2.Text); label1.Text = d.ToString(); } }

Abdussamed KOCAK · Answer

I do not have a problem with pressing chars or numbers. I have a problem to run the code in textBox. I dont wanna write the code under button_Click, i wanna do it in the textbox, so my code is gonna be dynamic. but still thanks for your interest :-)

Frogleg · Answer

Try this private void button1_Click(object sender, EventArgs e) { double d = Convert.ToDouble(textBox1.Text) + Convert.ToDouble(textBox2.Text); label1.Text = d.ToString(); } private void textBox1_KeyPress(object sender, KeyPressEventArgs e) { if (!Char.IsDigit(e.KeyChar) && e.KeyChar != 8) { e.Handled = true; } //allows only numbers and backspace } private void textBox2_KeyPress(object sender, KeyPressEventArgs e) { if (!Char.IsDigit(e.KeyChar) && e.KeyChar != 8) { e.Handled = true; } //allows only numbers and backspace }

How to Run the dynamic code in TextBox ?

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Answers (3)