G
Guest
How do I set the current value in a DropDownList? I populate the DDL and
then I want to position it to the current value.
then I want to position it to the current value.
C
Cor Ligthert
BillG,
There are an endless ways to do that, depending what you want to set in it.
Therefore you should in my opinion explain that first.
Cor
There are an endless ways to do that, depending what you want to set in it.
Therefore you should in my opinion explain that first.
Cor
C
Cor Ligthert
BillG,
Or do you mean just setting the selectedindex.
http://msdn.microsoft.com/library/d...ntrolsdropdownlistclassselectedindextopic.asp
By the way, using names as BillG gives mostly no answers.
I hope this helps,
Cor
Or do you mean just setting the selectedindex.
http://msdn.microsoft.com/library/d...ntrolsdropdownlistclassselectedindextopic.asp
By the way, using names as BillG gives mostly no answers.
I hope this helps,
Cor
G
Guest
Why, that is my name. Bill Gower.
C
Cor Ligthert
Why, that is my name. Bill Gower.Than is that cleared.
Cor
Cor
G
Guest
I have a ddl called ClassList which has ClassCD for DataValueField and
ClassDesc for DataTextField. I populate the list and then I load the current
member into the web form and I want to select the members classcd in the ddl
to show his/her current classcd
ClassDesc for DataTextField. I populate the list and then I load the current
member into the web form and I want to select the members classcd in the ddl
to show his/her current classcd
C
Cor Ligthert
Bill
And did you set the selectedindex to its value?
Cor
And did you set the selectedindex to its value?
Cor
Finding the index of an item known to be in a DDL
The question being asked is: we know the list of items in the DDL, so how do we determine the index number of the known item? How do we loop through the items in the DDL to determine the IndexNumber of the item we are looking for? I intend to take that number and use it in
DDL.SelectedIndex = intMyNumber
The question being asked is: we know the list of items in the DDL, so how do we determine the index number of the known item? How do we loop through the items in the DDL to determine the IndexNumber of the item we are looking for? I intend to take that number and use it in
DDL.SelectedIndex = intMyNumber
try this ...
Public Function DDLindexOf(ByVal strDDLname As String, ByVal strValue As String) As String
Try
'called by ASP
ropDownLists with DDLindexOf() in a <% %> tag
Dim objDDL As DropDownList
Dim objCellOuter As Control
Dim objCellInner As Control
Dim objCtrl As Control
Dim i As Integer
Dim strIndex As String
Dim bFoundDDL As Boolean = False
'find the value that the DDL should be set to
'by looking in the DataSet for the DataGrid
strValue = objViolationCodeDetails.Tables(0).Rows(masterDataGrid.EditItemIndex).Item(Replace(strDDLname, "ddl", "")).ToString.Trim
'EditItemIndex was set when the editCommand was sent.
'My control name is similar to the column name.
If strValue.Trim.Length = 0 Then
Throw New System.Exception("Column " & Replace(strDDLname, "ddl", "") & " does not exist in " & objViolationCodeDetails.Tables(0).TableName.ToString)
End If
'get a reference to the correct DDL
For Each objCellOuter In masterDataGrid.Controls(0).Controls 'rows
For Each objCellInner In objCellOuter.Controls 'columns
For Each objCtrl In objCellInner.Controls 'controls in the cell, usually asp:labels
If TypeOf objCtrl Is DropDownList Then 'test whether or not the control is a DDL
objDDL = objCtrl
If objDDL.ID = strDDLname Then
bFoundDDL = True 'fast way out of FOR/NEXT
Exit For
End If
End If
Next
If bFoundDDL Then Exit For 'fast way out of FOR/NEXT
Next
If bFoundDDL Then Exit For 'fast way out of FOR/NEXT
Next
If Not bFoundDDL Then ' objDDL should now reference a particular DDL on the
'DataGrid row being edited.
Throw New System.Exception("Cannot locate DDL " & strDDLname)
End If
'cycle through the values in the DDL to find this one, return its index
For i = 0 To objDDL.Items.Count - 1
If objDDL.Items(i).Value.Trim = strValue Then
strIndex = i.ToString
Exit For
End If
Next
If strIndex.Trim.Length = 0 Then
Throw New System.Exception(strValue & " is not a legitimate selected value for " & strDDLname)
End If
Return strIndex 'to use in the <% %> of the ASPX for the <asp:dropdownlist ... selectedindex tag
Catch ex As System.Exception
Throw New System.Exception(ex.Message, ex.InnerException)
End Try
End Function
Public Function DDLindexOf(ByVal strDDLname As String, ByVal strValue As String) As String
Try
'called by ASP
ropDownLists with DDLindexOf() in a <% %> tagDim objDDL As DropDownList
Dim objCellOuter As Control
Dim objCellInner As Control
Dim objCtrl As Control
Dim i As Integer
Dim strIndex As String
Dim bFoundDDL As Boolean = False
'find the value that the DDL should be set to
'by looking in the DataSet for the DataGrid
strValue = objViolationCodeDetails.Tables(0).Rows(masterDataGrid.EditItemIndex).Item(Replace(strDDLname, "ddl", "")).ToString.Trim
'EditItemIndex was set when the editCommand was sent.
'My control name is similar to the column name.
If strValue.Trim.Length = 0 Then
Throw New System.Exception("Column " & Replace(strDDLname, "ddl", "") & " does not exist in " & objViolationCodeDetails.Tables(0).TableName.ToString)
End If
'get a reference to the correct DDL
For Each objCellOuter In masterDataGrid.Controls(0).Controls 'rows
For Each objCellInner In objCellOuter.Controls 'columns
For Each objCtrl In objCellInner.Controls 'controls in the cell, usually asp:labels
If TypeOf objCtrl Is DropDownList Then 'test whether or not the control is a DDL
objDDL = objCtrl
If objDDL.ID = strDDLname Then
bFoundDDL = True 'fast way out of FOR/NEXT
Exit For
End If
End If
Next
If bFoundDDL Then Exit For 'fast way out of FOR/NEXT
Next
If bFoundDDL Then Exit For 'fast way out of FOR/NEXT
Next
If Not bFoundDDL Then ' objDDL should now reference a particular DDL on the
'DataGrid row being edited.
Throw New System.Exception("Cannot locate DDL " & strDDLname)
End If
'cycle through the values in the DDL to find this one, return its index
For i = 0 To objDDL.Items.Count - 1
If objDDL.Items(i).Value.Trim = strValue Then
strIndex = i.ToString
Exit For
End If
Next
If strIndex.Trim.Length = 0 Then
Throw New System.Exception(strValue & " is not a legitimate selected value for " & strDDLname)
End If
Return strIndex 'to use in the <% %> of the ASPX for the <asp:dropdownlist ... selectedindex tag
Catch ex As System.Exception
Throw New System.Exception(ex.Message, ex.InnerException)
End Try
End Function