Saving SelectedValue Of CascadingDropDown In DetailsView Into Database?
Dec 14, 2010
I have a form for our staff to list an event in a calendar system. In the form, there is a DDL for their Department, and a CasscadingDropDown that provides a list of staff members (the staff list is filtered by Department, as chosen in the first DDL). When the form gets submitted, I need to store the selected values of both DDL's (DepartmentID and StaffID, respectively) into the database.
So, I have a DetailsView, and am using the InsertItemTemplate. Now, I can get both DDL's populated correctly (with the cascade working correctly), and I used custom DDL's derived from the standard DDL class to avoid any Postback/EventValidation problems. But I can't seem to get the values of the user's selected items so I can save them back into the database! I've tried many different approaches, but all I seem to get returned is a value of "".
Here's what I have so far...
[code]....
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Oct 20, 2010
I followed a tutorial yesterday to implement CascadingDropDown lists but I can't find many examples of how to retrieve their selected value.
Can this only be done using javascript?
Is there any way to access the SelectedValue of the CascadingDropDown lists in the codebehind?
I'm using them in an EditItemTemplate, in a DetailsView, on a master/details page.
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Jul 30, 2010
I have a cascadingdropdown which works fine using a webservice and is populated. I can save the value of this dropdown to the database buy clicking a save button. However when the page reloads, the list is populated again. Is there a way to keep/set the selectedvalue after postback?
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Nov 9, 2010
I have two sets of cascading drop down lists they are contained in a detailsview <edititemtemplate>. The problem is that when the user clicks update; the original data is wiped out and the user has to redo the selection of all items contained in a cascading dropdown even if the user didn't want to change that particular aspect of a record. If the user doesn't select everything an error is thrown by the stored procedure in regrds to null values not being valid.
Is there a way i can use cascadingdropdown so that the current values are visible when the user clicks update; meaning that they don't have to redo selections for all items involving drop down lists. The current selections would be default values.
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Feb 20, 2010
I have three cascading drop down boxes populated by way of a web service. I would like the selection of the third box to then populate the details View based solely on that selection. When I run the page, the DetailsView is populated with every item from the table (using paging) instead of only showing the details of the item selected in drop down. In the database the a field named ItemId is the identity for the table. Am I simply not passing this correctly to the detailsView from the ddl?
Here is an example of what I have so far:
third drop down aspx snippet:
[Code]....
.vb code for dropdown event:
[Code]....
and aspx snippet for details view:
[Code]....
how the dropdown is populated:
[Code]....
GetItems is the following:
[Code]....
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Jul 23, 2010
i have a detailstview and sql datasource I am retrieveing the data so far no problems but afteradding a dropdownlist in edit mode and clicking edit button I get this error"
'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value.[Code]....
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I have a standard gridview and detailsview. My detailsview has some fields which are templates, with dropdownlists. The user selects a record in the gridview, then can go down to the detailsview, select Edit, and change some values (using dropdownlists).I am getting the error, "DDL has a selectedvalue which is invalid because it does not exist...." when I click Edit in the detailsview.
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<%-- Display list of Activities according to the Project--%>
<asp:UpdatePanel ID="UP_ActList" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:GridView ID="GV_ActList" runat="server" AutoGenerateColumns="False"
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<RowStyle BackColor="#EFF3FB" />
<Columns>
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SortExpression="ActID" />
.......Other BoundField were deleted for this post purpose............
<ItemTemplate>
<asp:LinkButton ID="LinkB_ViewActDetails" runat="server"
Text="Edit" CommandName="Select" CausesValidation="false"></asp:LinkButton>
</ItemTemplate>..............
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<asp:TemplateField
HeaderText="Course"
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[Code]....
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[URL]
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[Code]....
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