Dropdownbox - selected item - None Selected

I have a database field i.e. intLocationID that checks to see if it is found in dropdownbox, if not it should select NONE SELECTED.  Below works if the intLocationID matches, but bombs if it doesnt.  I want to be able to just select NONE SELECTED if it is not found.  Any help...  Thanks


            objCommand.CommandType = CommandType.StoredProcedure

objCommand.ExecuteNonQuery()
objSqlDataReader = objCommand.ExecuteReader()
cboLocation.DataSource() = objSqlDataReader
cboLocation.DataTextField = "LOCATION_NAME"
cboLocation.DataValueField = "LOCATION_ID"
cboLocation.DataBind()
If intLocationID > 0 Then
cboLocation.Items.FindByValue(intLocationID).Selected = True
End If
cboLocation.Items.Insert(0, "NONE SELECTED")
objCommand = Nothing
0
Drock22
2/18/2004 3:34:03 PM
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try moving the "none selected" to else


If intLocationID > 0 Then
cboLocation.Items.FindByValue(intLocationID).Selected = True
else
cboLocation.Items.Insert(0, "NONE SELECTED")
End If

hth
***********************
Dinakar Nethi
Life is short. Enjoy it.
***********************
0
ndinakar
2/18/2004 3:49:20 PM
Object reference not set to an instance of an object

for cboLocation.Items.FindByValue(intLocationID).Selected = True
intLocationID might not equal a item in the list....so
If cboLocation.Items.FindByValue(intLocationID).Equals(intLocationID) Then
cboLocation.Items.FindByValue(intLocationID).Selected = True
End If
if something like that worked....
IF intLocationID was found in the dropdown then select it.
0
Drock22
2/18/2004 4:00:53 PM

This doesnt work, but its an idea of what i'm looking for. I want to check in the dropdown whether or not an item exists, and if so select it. The item is intLocationID. I thought you would have to bind the dropdown, then loop through to see if the item exists.
objCommand.CommandType = CommandType.StoredProcedure
objCommand.ExecuteNonQuery()
objSqlDataReader = objCommand.ExecuteReader()
cboLocation.DataSource() = objSqlDataReader
cboLocation.DataTextField = "LOCATION_NAME"
cboLocation.DataValueField = "LOCATION_ID"

cboLocation.DataBind()
For each cboLocation.Items.item
If cboLocation.DataValueField.Equals(intLocationID) Then
cboLocation.Items.FindByValue(intLocationID).Selected = True
End If
Next
cboLocation.Items.Insert(0, "NONE SELECTED")
objCommand = Nothing
objSqlDataReader.Close()

0
Drock22
2/18/2004 4:20:07 PM
 cboLocation.Items.FindByValue(intLocationID).Selected = True  

should work...
check what vaue is coming into intLocationId..do a response.write of it..
hth
***********************
Dinakar Nethi
Life is short. Enjoy it.
***********************
0
ndinakar
2/18/2004 4:20:13 PM
The value might not always equal whats coming back.  Because of that there has to be a check before you write cboLocation.Items.FindByValue(intLocationID).Selected = True  or you will get a object reference problem.  

For example value might be 1
and the dropdownlist will contain
1,2,3... in that case it works
but if the value is 4 and the dropdownlist is 1,2,3 then i get a object reference issue because there is no items with that value.
0
Drock22
2/18/2004 4:24:27 PM
ok...then you have to loop through the items and check against each value...


for i = 0 to cboLocation.items.count -1
if cboLocation.Items.Item(i).Value = intLocation then
cboLocation.Items.FindByValue(intLocationID).Selected = True
exit for
end if
next

.....etc
hth

***********************
Dinakar Nethi
Life is short. Enjoy it.
***********************
0
ndinakar
2/18/2004 5:14:40 PM
Reply:

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