public static bool IsEditValueInDataSource(this LookUpEdit lookupEdit)
{
if (lookupEdit.Properties.DataSource == null || !lookupEdit.HasValue())
{
return(false);
}
bool result;
if (lookupEdit.Properties.DataSource is DataTable)
{
var dtLookup = lookupEdit.Properties.DataSource as DataTable;
result = DataTableContainsValue(dtLookup, lookupEdit.Properties.ValueMember, lookupEdit.EditValue);
}
else if (lookupEdit.Properties.DataSource is BindingSource)
{
var bsLookup = lookupEdit.Properties.DataSource as BindingSource;
result = BindingSourceContainsValue(bsLookup, lookupEdit.Properties.ValueMember, lookupEdit.EditValue);
}
else
{
result = false;
}
return(result);
}
/// <summary>
/// Clears the Editvalue if no longer in DataSource
/// </summary>
public static void CheckEditValueInAgainstDataSource(this LookUpEdit lookupEdit)
{
if (!lookupEdit.HasValue())
{
return;
}
if (!lookupEdit.IsEditValueInDataSource())
{
lookupEdit.EditValue = null;
}
}
/// <summary>
/// Clears the Editvalue if no longer in DataSource
/// </summary>
public static T GetEditValue <T>(this LookUpEdit lookupEdit)
{
T editValue;
if (lookupEdit.HasValue())
{
editValue = (T)lookupEdit.EditValue;
}
else
{
editValue = default(T);
}
return(editValue);
}