Topic: VC.net - using ints in a text box.

[Rob]

OK, I need some C++ advise. I don't want to post this at CProg - I've seen the way they treat noobs over there!

How the hell do I use (convert?) an int as text.

Code: [Select]

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
static int count;
char *temp;

if (this->button1->Text == "Hello")
{
this->button1->Text = "OK";
count++;
}
else
{
this->button1->Text = "Hello";
count++;

}
this->textBox1->Text += "."; // I want to use count here to write
// in the text box how many times I've clicked the button
}

};
If I wanted to do this in VB I'd just use

Code: [Select]

Textbox.Text = Textbox.Text & Val(count)
Any ideas?

[Dumah]

There's loads of ways to do this. the std function "atoi" is nice & simple

[charlie]

I think he wants int to string, not string to int.

I'd use stringstreams in general, but there is probably a better solution in .NET (which I don't use). What type is this->textBox1->Text?

[Rob]

Correct Charlie.

>>What type is this->textBox1->Text?

A string I think.

[charlie]

std::string? System::String? char*? wchar_t*?

Code: [Select]

// std::string
std::istringstream istr;
istr << this->textBox1->Text << "." << count;
this->textBox1->Text = istr.str();

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// System::string
this->textBox1->Text += ".";
this->textBox1->Text += Convert::ToString(count);

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// char* - assuming it's big enough
sprintf(this->textBox1->Text, "%s.%d", this->textBox1->Text, count);

[Rob]

Ouch. Dirty hack ahead

Code: [Select]

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
static int count;


if (this->button1->Text == "Hello")
{
this->button1->Text = "OK";
count++;
}
else
{
this->button1->Text = "Hello";
count++;

}

this->textBox1->Text = "" + count;
}

};
 

[Rob]

std::string? System::String? char*? wchar_t*?

Code: [Select]

// std::string
std::istringstream istr;
istr << this->textBox1->Text << "." << count;
this->textBox1->Text = istr.str();

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// System::string
this->textBox1->Text += ".";
this->textBox1->Text += Convert::ToString(count);

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// char* - assuming it's big enough
sprintf(this->textBox1->Text, "%s.%d", this->textBox1->Text, count);

This one...

Code: [Select]

// System::string
this->textBox1->Text += ".";
this->textBox1->Text += Convert::ToString(count);
Cheers Charlie.

[Rob]

Woot!

Code: [Select]

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
static int count;


if (this->button1->Text == "Hello")
{
this->button1->Text = "OK";
count++;
}
else
{
this->button1->Text = "Hello";
count++;

}

this->textBox1->Text = "You pressed the button " + Convert::ToString(count) + " times!";
}

};