How to Add Custom Text and Value to a C# WinForms ComboBox without a Binding Source?

Customize the ComboBox project without binding sources

When using a ComboBox in C# WinApp, the typical way to add text and values ​​to its items involves binding to a data source. However, if you don't have an existing binding source, you'll need another solution.

Solution: Custom class that overrides ToString() method

To overcome this limitation, create a custom class that contains both text and value properties. Override the ToString() method to return the desired text. Here is an example of such a class:

<code class="language-c#">public class ComboboxItem
{
    public string Text { get; set; }
    public object Value { get; set; }

    public override string ToString()
    {
        return Text;
    }
}</code>

Usage:

After defining your custom class, you can create instances and add them to the ComboBox:

<code class="language-c#">private void Test()
{
    ComboboxItem item = new ComboboxItem();
    item.Text = "项目文本1";
    item.Value = 12;

    comboBox1.Items.Add(item);
}</code>

Retrieve value:

To retrieve the underlying value of the selected item, cast it to a custom class and access the Value property:

<code class="language-c#">MessageBox.Show((comboBox1.SelectedItem as ComboboxItem).Value.ToString());</code>

This customization method allows you to populate the ComboBox with specific text that differs from its actual value, providing greater flexibility when managing projects without a dedicated data source.

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