# Expression Binding
## Using expression binding on DataPanel
### Hide a DataPanel
In this example we hide the xDataPanel based on the expression binding. We assume that the xDataPanel has the "DataSourcePath" set to "dsArt.art".
XAML initially:
```xml
```
XAML after setting Expression Binding for hiding condition (ExfresionBinding found on line 2):
```xml
```
{% hint style="info" %}
Based on this example the xDataPanel (x:Name=dpArt) will be visible if the binding(@artnr) has the value “1000”, if not, the xDataPanel will be collapsed
{% endhint %}
### Set the background color of a xDataPanelItem
Same as the one before we assume that the xDataPanel has the "DataSourcePath" set to "dsArt. art".
{% hint style="info" %}
Based on this example we change the background color of the xDataPanelTextBoxItem (x:Name=txtArtNr). If the binding value (@artnr) is “1000” the color will be red, if not the color is changed to blue.
{% endhint %}
XAML after setting Binding Expression for Background color (ExfresionBinding found on line 4):
```xml
```
Result:
## Using expression binding on DxDataGrid
### Change the background color of a row based on the binding
We assume that the xDataPanel has the "DataSourcePath" set to "dsArt.arbpl\_afo"
XAML initially:
```xml
```
Using expression to change the background color of the row based on “typ” of the row. In this case we need to set he binding to the property of the DxDataGrid(x:Name=” dxgarbpl\_afo”) called “RowBackgroundColorBinding”
{% hint style="info" %}
In this case if the binding(@RowData.Row\.typ) value is 20, the background-color of the grid row will pe LightGreen, if the value different the color will be set to null.
{% endhint %}
{% hint style="warning" %}
When using the expression on the DxDataGrid rows, always use @RowData.Row\.field\_name.
{% endhint %}
XAML after Expression Binding was set (ExfresionBinding found on line 2):
```xml
```
Result:
### Change the color of a cell based on the binding
Using the same expression, but this time on the DxComboBoxColumn(x:Name=”tbAfoTypDG”) will change only the color of the cell.
XAML after Expression Binding was set (ExfresionBinding found on line 4):
```xml
Standard
Alternativ
```
Result:
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://tldocs.gitbook.io/documentation/framework/expression-binding.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.