Add Alternative Text for Image and Bound Image Items in WinForms
To ensure that your dashboard is accessible, specify alt text for image items: ImageDashboardItem and BoundImageDashboardItem. Screen readers identify image items as follows: “{alt text} pane”.
Both Image and Bound Image dashboard items display alternative text when the image cannot be loaded.
Image
Select an Image item and click the Edit Names button in the Design Ribbon tab to edit alt text:
You can also right-click the item and select Edit Names in the pop-up menu:
Specify alt text in the Edit Names dialog:
Click OK to save alt text in the dashboard XML definition.
In code, use the ImageDashboardItem.ImageAltText property to specify alt text.
Bound Image
The Bound Image dashboard item contains the Alternative text data section with the corresponding placeholder. Add a data source field to supply data:
Create a calculated field and use it as an alt text source if you want to share more details with a screen reader.
To supply alt text for a Bound Image in code, use the BoundImageDashboardItem.ImageAltTextDimension property. Specify a dimension that contains required strings.