Forms Data Controls :: DropDownList DataBind; Appends Instead Renew Items?
Apr 9, 2010
environment: VS2008 When running below code the DDLKlient.DataBind() appends the whole set of names to the already existing list. I.e. I have 2 sets of names in the DropDownList!Question:? what can I do to prevent appending and just get 1 (one) set of names?? is there any refresh option?
Protected Sub DVKlient_ItemInserted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewInsertedEventArgs) Handles DVKlient.ItemInserted
Dim connString As String
Here is the situation I have, I have a repeater inside a Usercontrol. The datasource is a IEnumerable<Investor> Exposed through a UserControl's Property. I have overridden the UserControl's databind event to set the Repeater Datasource before databinding the repeater. When it's not a postback, it databinds find and the events on the repeater item's controls fires up fine. But there is one event on repeater items (Delete Investor) which call back the DataBind of the UserControl after removing the Investor from de datasource. When this Event is called, it does all the work (deleting the investor and so on...) calls back the usercontrol's databind but when (within the usercontrol databind) the repeater is databinded again, the repeater items doesn't update (repeater items for investor not on the DataSource anymore still appears). My ItemDataBind doesn't even fire by then.
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and code bedind
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I Tried with both the Repeater Item Command and each LinkButton Event to see if it would make any difference, but none worked
I have a DropDownList with a list of orders. When an order is selected from the list I generate a GridView with details of that order. Within the GridView I call other databound controls and all works fine until I finish the orders in the DropDownList
I have tried to enclose the code within a if dropdownlist.items isnot nothing end if but it makes no difference
This is the code:
Protected Sub GridView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.DataBound If DropDownList1.Items IsNot Nothing Then GridView1.SelectedIndex = 0 [code]...
i have dropdownlist. After i loaded data from javascript to dropdownlist,i used dropdownlist.item.count but counter always null. how to refresh dropdownlist?
In my project I have a listview which I am binding from code behind. Now I would like to add a droppdownlist for each item in listview. So my question would be:
Is there a way to populate my dropdownlist whit data which I have in a List?
Here is a bit of code to show how my listview looks like:
I am placing a dropdown list in the footer of a DataGrid like this:
[Code]....
In my code behind file, in the myDDL_OnLoad event handler, I call to the database, populate a SqlDataReader, and set the DDL's datasource to that datareader. I define what data columns should be used for the DataValueField and DataTextField of the dropdownlist. Then I call the DropDownList's DataBind() method. Everything works without error. But, when the dropdownlist is displayed, it has blank lines in it.
By that, I mean if 8 records are loaded into the dropdownlist, it will expand to a size appropriate for 8 rows but, it will be empty. there is no text in it.
Has anyone seen this type of behavior before? This dropdownlist is in the footer of a dynamically loaded ajax update panel so, it is difficult to see the source code to see what values are in the html element rendered to represent the dropdown.
I am trying to hide 2 buttons depending on the value in the dropdownlist. It works when the page is initially loaded but chokes when returning to the page sometimes. I have some pretty simple code in the Page_Load event within an If Not Page.IsPostBack statement
I have a Gridview showing the MemberLastName, MemberFirstName, MemberBirthYear, MemberGender, MemberRelationship.
During Edit mode, I have managed to display a DropDownList for the Relationships.What I am trying to achieve now, is that, based on the Gender of the member I would like to limit the items in the Relationships dropdownlist.
e.g if the Gender is Male, then only display Male Relationships
What is the best way to achieve this scenario?Here is my snippet of code for the event. The code is commented out as it throws an exception.
I am in the process of writing a type of shopping cart, to be used to select parts from a database table via a gridview displaying search results. The search functionality works great. I included a textbox as a template field so that users can input the quantity of each item the want quoted. My code-behind file writes the gridview values to a databtable and is supposed to databind to a listbox. However, when I run the page in browser, the listbox items are selectable but not visible. Here's my code:
1. Code Behind:
[Code]....
ASPX:
[Code]....
What do I need to do to make the listbox items visible?
I have a series of dropdownlists on webform in ASP 4.0. The first drop down is filled upon load, and then when a user selects a value from that list, it populates the second dropdown. To accomplish this, I have a SQLdatasource with a parametersource of the first drop-down list control. This works great, except when a user changes their selection from the first drop down. It performs the query, but then adds the list of items to the ones that were already there from the previous selection, instead of replacing it with the new data. Here is the code:
[Code]....
Do I need to do something on selectedindexchanged to somehow "clear out" the previous datasource? I can't find anything about this online, although one person seemed to suggest it was related to using a master page. (which I am using).
No you cannot add a third parameter in the Dictionary. It contain Key Value pair data.But if you want to add third parameter then simply use DataTable and add these in the DataTable row.Name of Builder , Title Of Buidler , Builder ID
So how to acheive that task ? so far i did like this :
public void AddNewCMP(string PersonName , string PersonID , string PersonTitle) { var dt = new DataTable(); if (ViewState["CMPDataTable"] != null) { dt = (DataTable)ViewState["CMPDataTable"];
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Now on button click i want to add six drop down values to AddNewRow(value1,value2,value3) method .... how to do that ?
' Show which halls they are eligible for. Dim dbRooms As New pbu_housingEntities Dim gender As String = Session("gender").ToString Dim hall As String = CStr(Session("hall")) Dim selectedRooms = (From sh In dbRooms.Rooms _ Where sh.gender = gender _ Where sh.current_occupancy < sh.max_occupancy _ Where sh.is_available = True _ Where sh.building_name = hall _ Select sh.room1, actual_available = sh.max_occupancy - sh.current_occupancy ) rptrRooms.DataSource = selectedRooms rptrRooms.DataBind()
Which, as you can see, is bound to a repeater. Now, it contains multiple values and I'd like to display them in a nicely formatted way, pseudo code below:
I have a web in asp.net and code in vb and sql database. There is a dropdownlist ina page the length is too big. How can I set to multi row or some other kind....
I have successfully implemented article - "Print only the items which are selected using checkbox in a ASP.Net DataList control"
I would like to add a dropdownlist above the DataList Control to filter the contents of Datalist and then print the items selected using Checkbox in a ASP.NET DataList Control.
I got this error when select a row from a grid view to update
'ddl_ctegOf_Product_update' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value 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.ArgumentOutOfRangeException: 'ddl_ctegOf_Product_update' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value
Source Error: Line 265: txt_prodID_update.Text = gridTo_updateFrom.SelectedRow.Cells[1].Text; Line 266: txt_prod_name_update.Text = gridTo_updateFrom.SelectedRow.Cells[2].Text; Line 267: ddl_ctegOf_Product_update.SelectedValue = gridTo_updateFrom.SelectedRow.Cells[3].Text; Line 268: txt_cateIn_hardCopy_update.Text = gridTo_updateFrom.SelectedRow.Cells[4].Text.Replace(" ", ""); Line 269: txt_prodID_update.ReadOnly = true;
The code of update:
private void PopulateDropDownList() { string constr = ConfigurationManager.ConnectionStrings[1].ConnectionString; using (SqlConnection con = new SqlConnection(constr)) { using (SqlCommand cmd = new SqlCommand("SELECT CategoryProd_ID,Cate_Pro_Name FROM CategoryOfProduct", con)) { using (SqlDataAdapter da = new SqlDataAdapter(cmd))
