How to Pass Data from a Child Form to a Parent Form in C#?

Retrieving Data from Child Forms in C#

Efficiently transferring data from a child form back to its parent is a common task in C# Windows Forms development. This article demonstrates a simple and effective method using properties.

When a child form, opened with ShowDialog(), needs to return data to its parent, a property on the child form provides a clean solution.

Here's an example:

<code class="language-csharp">// In the parent form:
using (FormOptions formOptions = new FormOptions())
{
    formOptions.ShowDialog();
    string result = formOptions.Result; // Access the data through the property

    // Process the 'result' data...
}


// In the child form (FormOptions):
public string Result { get; set; } // Property to hold the data

private void button1_Click(object sender, EventArgs e)
{
    Result = textBox1.Text; // Set the property value before closing
    this.Close();
}</code>

This approach directly accesses the data using a property (Result) on the child form after the child form is closed. This keeps the data transfer clear and easy to understand.

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