Forms Data Controls :: DetailsView DropDownList Do Not Find ListItems Entries?
Mar 30, 2010
I am using Visual Studio 10/ASP4 but I am sure this problem is me. I created a program and got it all working. GridView and DetailsView, edit, insert and delete all works. :-)... I have spent 4 solid days attempting to have a simple DropDownList with three items on it EDIT a record. Lots of GOOGLeing for suggestions. It just will not work. The insert dropdown works fine(thats how I created the record). I wrote a new simplified program with just the detailsview and the edititem dropdownlist. Still can't get it to work. The detailsview data has a record and the "mode" field (char(20)) has three letters "FTP" in it. The letters display on the Detailsview. I can edit fine but when I add the following drop down list the page aborted with a
"'DropmodeEdit' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value"
Yet there is only one record and it HAS "FTP" in it! The list has FTP in it? I just don't get it, why?
I added an ondatabinding routine and breakpointed it in the try/catch and found the selectedindex pointed to the correct entry and the items list had the correct entry with no spurious data or spaces. The data being passed displayed good in the detailsview, Am I correct in assuming that is bound to the dropdownlist automatically? or is there some majic that I did not get from Rob Burke?
Here is what am trying to accomplish...I want to have a DropDownList that is populated by a field from a table. Then once a user selects one of the enteries, he/she then enters a value for that selection in a textbox, then clicks enter or add....now upon doing this, I want to have a GridView that tabulates all the entries the user adds, and keep a total of all entries as the bottomline in the GridView. I can't seem to wrap my head around how to get it done.Does anyone know how I can get this done, or are there examples out there that my searches have missed cause I haven't really seen any examples I could look at. I would think this should be a common solution that is used all over
I need to get a dropdownlist itemlist to expand in MSIE. The width of the dropdownlist control is set to a fixed width and it cannot be altered onclick, so I need to have the list of items that drops down when clicking autoexpand widthwise. I have tried several different jquery options that are out there, but they are not stable because they do not work on every click and sometimes forces the user to click twice for the itemlist to appear. Displaying a tooltip is not enough, I need to see the list expanded.
The list should look like this;
**DROPDOWNLISTCONTROL**
**LONG CONTENT THAT STRETCHES WHEN EXPANDED**
The list currently look like this in MSIE, and I cannot expand the dropdownlistcontrol,
**DROPDOWNLISTCONTROL**
**LONG CONTENT THAT STR**
Is there anyone who knows of a smart way to do this?
I have a DetailsView control where I use templatefields. One of them are textcontrol tempatefield and dropdownlist templatefield.
What I want to so is, when I select let's say "Dollar" value in DropDown list, textcontrol text to be assigned "USD". Basically, text property of textcontrol to be asggined based on dropdownlist selected value.
I am trying to use something like this but it gives me an error:
I have a field that is based on asp.net membersip UserID. I can bind this to dropdowns which aren't in a detailsview just fine, but for somereason my code isnt working for finding the control properly.I have the following in detailsview.databound (where it was suggested to be placed)
I can't seem to reference a control properly, so that I could then change its properties. I have 3 fckeditor controls specified in edittemplate fields, but i only want to diplay them all if the querystring equals 1. so i created in aspx.cs file: {
i've a fileupload control <asp:fileupload> called (UpImage) inside the <EditItemTemplate> called (dtlAlbums) of a <asp:DetailsView> which is inside a <asp:GridView> called (grdAlbums), when i use the below code to find the control (UpImage) i get an error at the RED line that, (Object not set to a reference of an object)
I am trying to target a control in a Detailsview in my codebehind, however I am getting an error "Name "control" is not declared" for example, i have a FileUpload field in the edit template of the detailsview, which I am trying to access as
FileField.PostedFile.SaveAs("directory")
I also tried adding a reference to the Detailsview id such as DetailsView1.FileField.PostedFile.SaveAs("directory")
I have a DropdownList where some of the items are longer then the width of the list. Firefox expands the width of the list and shws the full length of the ListItem, but Explorer (som people still use that) doesn't do that which results unability to read the whole of the ListItem. I added a "Title" attribute (Tooltip) to the ListItems which shows the full text but even though, the client asks if it's possible to split long ListItems in several lines so user will be able to read it without needing the Tooltip.
How do i use drop down list in the details view? While inserting user should be able to select the "Car Name" from the drop downlist and the "Car Id" should be get inerted into database. Also while editing the appropriate Car Name should be selected in the drop down list.
How the HTML code and the Binding should look for this details view ?
I would like to find controls in the detailsview control placed in the EmptyData Template of the gridview. I am trying to create Insert new record for the gridview control.
1. If there are existing records in the table - works fine and sets my two values: I placed Detailsview and Insert Button in the footer of the gridview. I needed to set the values of two fields. When I click on the Insert button it saves new record and sets the field with the value (code attached - works fine). I also have a popup extender that opens detailsview - this works just fine.
2, If ther are not records in the table - saves record but cannot find and set controls on the detailsview Same thing setup in the EmptyData Template. The record is saved but I cannot Find and set the field value on the control.
1. Link button (on click) in the gridview footer (works fine)
I am trying to use a DropDownList in a DetailsView for the ItemTemplate, InsertItemTemplate, and EditItemTemplate. I must bind this DropDownList to a SQL-Server support table using a function that returns a DataTable. I am not allowed to use a SQLDataSource in my backwards IT department. So, not only do I need to load the DropDownList, I also need to make the SelectedValue equal to the current record that I am viewing, editing.
I figure that this should be relatively straightforward, but I still can't get it to work. I have a gridview and a detailsview to set up shifts for students and teachers. I would like to be able to insert new shifts using a detailsview. I will limit the students, teachers and location to items that are in a dropdownlist. The problem is that when I handle the iteminserting event. the e.values collection doesn't contain all of the fields I want to populate. How do I add the new fields to the list. This is my codebehind:
Sub On_Inserting(ByVal sender As Object, ByVal e As DetailsViewInsertEventArgs)
I have a dropdownlist in the edititemtemplate of a detailsview. The dropdownlist is bound with an objectdatasource. The detailsview is bound to a seperate objectdatasource which connects it to the insert method. When the page loads the dropdownlist is bound properly. However, when I make a selection and select insert I get the following error: Could not find a property named 'DeptID' on the type specified by the DataObjectTypeName property in ObjectDataSource 'objCurrentProduct'. I've tried to remove the SelectedValue='<%# Bind("DeptID") %> attribute. I can then insert without an exception being thrown but the selected value of the dropdown is not recognized. Here is the code:
I have a template field in a Details View which is a dropdown selection of values.While I can get the value of the textfields in the DetailsView by using: DetailsView1.Rows(i).Cells(1).Text.ToStringI don't know how do extract a value from a dropdownlist2 contained in the DetailsView.
I've got a master table and a child table. The master table has a nullable column called ReferenceID and in some cases it should be NULL, but when it's null in a record, I get an error while going to Edit mode of DetailsView.
In Read Only mode all everything is OK, but when I click on Edit and Postback happens, I get the following error: Server Error in '/Sample' Application. 'DropDownList_Reference ' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value It means that in MasterTable, the ReferenceID shouldn't be NULL, but it should be in some cases.
I have created two dropdown lists. The 2nd DDL depends for values on the 1st DDL. I have written code on the SelectedIndexChanged event of 1st DDL to change values of 2nd DDL. also i have used detailsview. In the template field i have used 2 DDL mentioned above. they are having SelectedValue='<%# Bind("") %>' property. Everything works fine but when i tried to edit record in detailsview & select value from 1st DDL then it gives me following error.
Server Error in '/' Application. Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
I have an ASP.NET/C# web project that uses an Entity Data Model and Entity Framework to interact with my database. I also have a DetailsView control that will serve as the control used to insert a new record. The user will need to be able to select from multiple, cascading dropdownlist controls to determine what parent record this new record will belong to. Here is an example.Say we have an online ordering system with the following hierarchy.
Customers -> Orders -> OrderParts -> Parts
We're going to add a new part to an order, under a customer. Ultimately the orderparts table won't have a reference to a customer, just an order. The order will have the reference to the customer. In the DetailsView for the new orderparts record we will need two cascading dropdownlist controls. One for customer and one for order, since we won't want to view some crazy amount of orders all in one dropdownlist.
However, the customer dropdownlist should not be bound to the detailsview control since there is no field for it. I also don't want to use the AJAX control since I don't want to create a separate web service to provide all of this information to the dropdownlist controls.
i am using visual studio 2008 vb. i have a dropdownlist in my detailsview populated with product id. when i select an id, the product name will appear on a label. however, when i change the product id in the dropdownlist, an error occur "Conversion from string "ProductName" to type 'Integer' is not valid." Here's the code file.
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Dim lbl As Label = DetailsViewOrderDetails.FindControl("Label4") Dim ddl As DropDownList = DetailsViewOrderDetails.FindControl("DropDownList1") lbl.Text = ddl.SelectedValue("ProductName").ToString() End Sub
