How can I check if a column exists in result that populate a listview? The listview is populated from a stored procedure.
This is what I tried but no success:
<%# Container.DataItem.GetType().GetProperty("Phone")==null?"phone is null":"we have phone property" #>
or should I use e instead Container.DataItem ?
First, i would use codebehind if it's getting complicated (i use it almost always). Here i would use the ListView's ItemDataBound
event which is triggered for every item:
protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
// assuming you have an ItemTemplate with a label where you want to show this
Label lblInfo = (Label) e.Item.FindControl("LblInfo");
DataRowView rowView = (DataRowView)e.Item.DataItem;
if (rowView.Row.Table.Columns.Contains("Phone"))
{
lblInfo.Text = "we have the phone property";
}
else
{
lblInfo.Text = "no phone available";
}
}
}
That makes the code much more readable, maintainable, debuggable and type safe.