Performing Basic Validation with the Error Provider Control in C#

Performing Basic Validation with the Error Provider Control in C#

The ErrorProvider control is quite useful when it comes to user input validation. The next code segment assumes an ErrorProvider control named errorProvider1 has been placed on a form along with a Textbox named usernameTextBox and a ComboBox named comboBox1.

private void usernameTextbox_Leave(object sender, EventArgs e)        {            if (String.IsNullOrEmpty(usernameTextbox.Text))            {                errorProvider1.SetError(usernameTextbox, "enter a value"); //Check For Empty Strings            }            else            {                if (usernameTextbox.Text.All(char.IsDigit))                {                    errorProvider1.SetError(usernameTextbox, "enter a string value!"); //Check for Numbers                }                else                {                    if (usernameTextbox.Text.Length  8)                    {                       errorProvider1.SetError(usernameTextbox, "can only be 8 characters long"); //Check Length                    }                }            }        }        private void comboBox1_Leave(object sender, EventArgs e)        {        }        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)        {            if (int.Parse(comboBox1.SelectedItem.ToString())              {                errorProvider1.SetError(usernameTextbox, "can only be 18 and above"); //Determine Selection            }        } 
Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes