Using a textBox for alert

Israel

Hi!

I would like to make a textbox alerting when I make an operation. These codes work well. But I need to use a Textbox to boot an alert.

private void textBox3_TextChanged(object sender, EventArgs e)

{

string s = (sender as TextBox).Text;

int i = Convert.ToInt16(s);

if (i > 5)

{

MessageBox.Show("Number greater than 5");

(sender as TextBox).Focus();

}

For instance, TextBox1.Text + TextBox2.Text = TextBox3.Text //If the answer its more than five (5). Then popup the message.

6 Replies

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Vincent Maverick Durano10y ago
Accepted answer
TextChanged will only trigger if the text was changed or when you typed into the TextBox. If your TextBox3 depends on the other TextBoxes then you should write the code in your other TextBox and not on your TextBox3.

void CalculateSum(string n1, string n2){
if(n1 == string.Empty)
n1= "0";
if(n1 == string.Empty)
n2= "0";
int result = Convert.ToInt32(n1) + Convert.ToInt32(n2);
TextBox3.Text = result.ToString();
if(result > 5){
MessageBox.Show("Number greater than 5");
}
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
CalculateSum(textBox1.Text,textBox2.Text);

}
private void textBox2_TextChanged(object sender, EventArgs e)
{
CalculateSum(textBox1.Text,textBox2.Text);
}
Israel10y ago
On my form I have three textbox (textbox1, textbox2, textbox3). Then on these codes I said that when the result is more than number 5. Then popup this message: MessageBox.Show("Number greater than 5");
Now what I need to do? I would like to control this textbox3. Means that I need to focus clearly into my code that the alert should be made on textbox3.
I am sure its must be clear now. If not please inform me.

private void textBox3_TextChanged(object sender, EventArgs e)
{
string s = (sender as TextBox).Text;
int i = Convert.ToInt16(s);
if (i > 5)
{
MessageBox.Show("Number greater than 5");
(sender as TextBox).Focus();
}
}
Upendra Pratap Shahi10y ago
Kindly elaborate your question clearly.
Israel10y ago
I think I do explain wrong. I would like to say that the textbox3 should give a message alert when a number is more than five (5) for example.
Means textbox1.text + textbox2.text = textbox3.text // if (i > 5) the textbox3.text should alert.
Upendra Pratap Shahi10y ago
Hi,

Go through below link-

http://www.codeproject.com/Questions/440848/How-to-Display-Alert-Message-Box-When-User-Click-O

http://www.scriptscoop.net/t/4cd26cb78365/java-how-to-display-a-variables-value-in-a-message-box.html

Kindly accept the answer.
Amit Kumar10y ago
Hi dear,
Please try this code..

if (String.IsNullOrEmpty(textBox1.Text))

{

if (MessageBox.Show("Are you sure you want to close the form?", "Warning", MessageBoxButtons.YesNo) == System.Windows.Forms.DialogResult.No)

e.Cancel = true;

}

else

{

if (MessageBox.Show("You want to save data or not?", "Warning", MessageBoxButtons.YesNo) == System.Windows.Forms.DialogResult.Yes)

{

//Save data

}

}