# Format the Text Displayed by the MapMouseLocationIndicator Element
## Environment
| Product Version |
2025.3.815 |
| Product |
RadMap for WPF |
## Description
Format the text that is displayed by the `MapMouseLocationIndicator` control.
## Solution
To format the text, extend the MapMouseLocationIndicator class to define a `TextBlock` property, which will call the `GetTemplateChild` method with parameter **"PART_TextBlock"**, and override the `OnMapInitialize` method. In it, you can format the text, as well as subscribe to the `MouseMove` event of the `RadMap` control that comes as a parameter, in which you can format the `TextBlock` each time the mouse moves.
#### **\[C#] Extending the MapMouseLocationIndicator class to customize the format**
```
public class CustomMapMouseLocationIndicator : MapMouseLocationIndicator
{
private const string IndicatorTextBlockPartName = "PART_TextBlock";
private TextBlock IndicatorTextBlock
{
get
{
return this.GetTemplateChild(IndicatorTextBlockPartName) as TextBlock;
}
}
protected override void OnMapInitialize(RadMap oldMapControl, RadMap newMapControl)
{
if (oldMapControl != null)
{
oldMapControl.MouseMove -= new MouseEventHandler(this.MapControl_MouseMove);
}
if (newMapControl != null)
{
newMapControl.MouseMove += new MouseEventHandler(this.MapControl_MouseMove);
if (this.IndicatorTextBlock != null)
{
this.IndicatorTextBlock.Text = this.LocationToString(newMapControl.Center);
}
}
}
private void MapControl_MouseMove(object sender, MouseEventArgs e)
{
Location mouse = Location.GetCoordinates(this.MapControl, e.GetPosition(this.MapControl));
if (this.IndicatorTextBlock != null)
{
this.IndicatorTextBlock.Text = this.LocationToString(mouse);
}
}
private string LocationToString(Location location)
{
string locationStr = string.Empty;
switch (this.LocationFormat)
{
case LocationFormat.Geographical:
LocationDegrees degrees = new LocationDegrees(location);
locationStr = degrees.ToString();
break;
case LocationFormat.Number:
locationStr = $"{location.Latitude:n5}, {location.Longitude:n5}";
break;
}
return locationStr;
}
}
```
#### **\[XAML] Using the extended MapMouseLocationIndicator class**
> important If you are using the **NoXaml** version of our assemblies, you need to create a new `Style` that targets the `CustomMapMouseLocationIndicator` type. Then, it needs to be based via the `BasedOn` property on the default `Style` for the `MapMouseLocationIndicator` type, which has an **x:Key="MapMouseLocationIndicatorStyle"**.
> caption MapMouseLocationIndicator with formatted text
