Why does the DataGrid web server control contents wrap when ItemStyle Wrap or HeaderStyle Wrap Property is set to False
The wrap functionality occurs for each cell and not for each row of the DataGrid. Therefore, if you disabled the wrap functionality for all of the DataGrid, text wrapping functionality is not disabled for every row or column.
To resolve this make sure that every column of the DataGrid has the ItemStyle Wrap property explicitly set to False as follows:
For more details refer
- Microsoft Knowledge Base Article - 323169
- Microsoft Knowledge Base Article - 324165