Two-Way Data Binding

• Jan 20, 2026
• 4 minutes to read

DevExpress Blazor components support two-way data binding (refer to ASP.NET Core Blazor data binding). This means you can use the @bind attribute to implement binding between a component’s property and a data field.

The following code uses the @bind-Text attribute to bind a text editor’s Text property to a TextValue data field. When the editor is rendered, the property’s value comes from the bound field. When a user changes the input value and removes focus, the property’s value is updated.

<DxTextBox @bind-Text="@TextValue" />

@code {
    string TextValue { get; set; } = "Some text";
}

When you use the @bind attribute, the component sets Text, TextExpression, and TextChanged internally. If you use the @bind attribute and handle the TextChanged event simultaneously, the following error occurs: The component parameter ‘TextChanged’ is used two or more times for this component….

To react to text changes, specify the Text property without the @bind attribute and handle the TextChanged event explicitly. You must also specify the TextExpression property if the editor is displayed in an EditForm.

<DxTextBox Text="@TextValue"
           TextExpression="@(() => TextValue)"
           TextChanged="@((newValue) => OnTextChanged(newValue))" />

@code {
    string TextValue { get; set; } = "Some text";

    void OnTextChanged(string newValue) {
        TextValue = newValue;
        // Perform other actions here
    }
}

Examples

You can use two-way data binding for DevExpress Blazor components that have a <PropertyName> property and a <PropertyName>Changed event, for example:

• DxDateEdit. Use @bind-Date, or set Date, DateExpression, and DateChanged.

• DxComboBox. Use @bind-Value, or set Value, ValueExpression, and ValueChanged.

• DxCheckBox. Use @bind-Checked, or set Checked, CheckedExpression, and CheckedChanged.

• DxListBox. Use @bind-Value, or set Value, ValueChanged, and ValueExpression to bind to a single object. Analogically, use @bind-Values, or set Values, ValuesChanged, and ValuesExpression for a collection.

• DxTagBox. Use @bind-Value, or set Values, ValuesChanged, and ValuesExpression to bind to a collection.