Checking the HTTP Response Status Code

Download Chilkat .NET for 4.0 Framework

Download Chilkat .NET for 64-bit 4.0 Framework (x64)

Download Chilkat .NET for 2.0 / 3.5 Framework

Download Chilkat .NET for 64-bit 2.0 / 3.5 Framework (x64)

Download Chilkat .NET for 1.0 / 1.1 Framework

Simple HTTP GET request to download the HTML of a web page. Check the HTTP response status code (i.e. 200, 404, etc) to see if it downloaded successfully.

Chilkat.Http http = new Chilkat.Http();

bool success;

// Any string unlocks the component for the 1st 30-days.
success = http.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(http.LastErrorText);
    return;
}

// Send the HTTP GET and return the content in a string.
string html;
html = http.QuickGetStr("http://www.google.com/");

int status;
status = http.LastStatus;

if (status == 200) {
    textBox1.Text += "status = 200, OK!" + "\r\n";
    textBox1.Refresh();
}
else {
    textBox1.Text += "HTTP Response status = "
         + Convert.ToString(status) + "\r\n";
    textBox1.Refresh();

    // Display the complete response header.
    textBox1.Text += http.LastResponseHeader + "\r\n";
    textBox1.Refresh();
}

// Now try a URL where we know we'll get a 404 response:
html = http.QuickGetStr("http://www.chilkatsoft.com/NothingHere.html");

status = http.LastStatus;

if (status == 200) {
    textBox1.Text += "status = 200, OK!" + "\r\n";
    textBox1.Refresh();
}
else {
    textBox1.Text += "HTTP Response status = "
         + Convert.ToString(status) + "\r\n";
    textBox1.Refresh();

    // Display the complete response header.
    textBox1.Text += http.LastResponseHeader + "\r\n";
    textBox1.Refresh();
}