[Solved] How to execute code when I move from textbox to the next one in c#? [closed]

Introduction

When developing a C# application, it is often necessary to execute code when a user moves from one textbox to the next. This can be done by using the TextChanged event of the textbox control. In this article, we will discuss how to execute code when a user moves from one textbox to the next in C#. We will also discuss some of the best practices for using the TextChanged event.

Solution

You can use the TextBox.Leave event to execute code when the user moves from one textbox to the next. The following example shows how to use this event to execute code when the user moves from one textbox to the next:

// Create a TextBox object
TextBox txtBox = new TextBox();

// Add the TextBox.Leave event handler
txtBox.Leave += new EventHandler(txtBox_Leave);

// Create the event handler
private void txtBox_Leave(object sender, EventArgs e)
{
// Execute code when the user moves from one textbox to the next
// …
}

private void FileNo_txt_Leave(object sender, System.EventArgs e)
{
     //check if that file number is exist in the database or not.

}

this.FileNo_txt.Leave+= new System.EventHandler(this.FileNo_txt_Leave);

If you are looking for a way to execute code when you move from one textbox to the next one in C#, then you have come to the right place. In this article, we will discuss how to achieve this using the TextChanged event.

The TextChanged event is triggered when the text in a textbox is changed. This event can be used to execute code when the user moves from one textbox to the next. To use this event, you need to add an event handler to the TextChanged event of the textbox.

The following code shows how to add an event handler to the TextChanged event of a textbox:

textBox1.TextChanged += new EventHandler(TextBox1_TextChanged);

private void TextBox1_TextChanged(object sender, EventArgs e)
{
    // Execute code here
}

In the above code, we have added an event handler to the TextChanged event of the textbox. When the text in the textbox is changed, the event handler will be triggered and the code inside it will be executed.

You can also use the Leave event of the textbox to execute code when the user moves from one textbox to the next. The Leave event is triggered when the user leaves the textbox. To use this event, you need to add an event handler to the Leave event of the textbox.

textBox1.Leave += new EventHandler(TextBox1_Leave);

private void TextBox1_Leave(object sender, EventArgs e)
{
    // Execute code here
}

In the above code, we have added an event handler to the Leave event of the textbox. When the user leaves the textbox, the event handler will be triggered and the code inside it will be executed.

In this article, we have discussed how to execute code when the user moves from one textbox to the next in C#. We have discussed two different ways to achieve this using the TextChanged and Leave events of the textbox.