Basically when editing an item, I want to bind its ProviderId value to the DropDownList's select value.DropDownList is getting its list of values from other entity entity_List as you can see.
Markup:
<asp:ListView ID="aList" runat="server" OnDataBound="aList_OnDataBound" DataKeyNames="ListServID" DataSourceID="ListServCon" InsertItemPosition="LastItem" selectedvalue='<%# Bind("ProviderID") %>' >
[code]...
I've got a class that implements IListSource and returns a generic List of ListItem objects (List<ListItem>). in this list one of the ListItems has the Selected attribute set to true.On the web page I have a standard asp:dropdownlist and I set it's datasource to the getList method of my class and databind it.The problem is that the databind seems to loose the selected Item and the first item in the generic list becomes selected.
View 8 RepliesI have many controls on my form, but in particular, I have 2 dropdownlists. 1 dropdown list has 2 values, and each value controls what the second dropdownlist displays. This is an edititemtemplate and both dropdowns have the selecteditem set via '<%# Bind("fieldname") #>' on page load.
THe problem is, if I change the value of the first dropdown, it errors out because the second dropdwon has a bound value that is no longer acceptable.
Can I cancel the bind of the second control, if the the first one is changed? I would like to cancel the bind, and update the values by using a different datasource depending on the value of the first dropdown or hardcode the new values.
If Dropdown1 has a value of "A" for example Dropdown 2 Shows Values "1", "2", "3"
If Dropdown 1 has a value of "B" , Dropdown2 Shows Values "4", "5", "6".
It binds fine initially, but if I change Dropdown1 from A to B, I want Dropdown2 to show the new values, maybe with a default of "Select an Item" and not error out b/c it's attempts to bind a value of 1, 2, or 3.
I have a collection of objects I bind to a Listview like this:
if (!IsPostBack)
{
List<Equipment> persons = new List<Equipment>
{new Equipment{ItemName = "Sworn", ItemCount = 7, ItemCost = 255}, [code]....
I want to Add/update/delete from this object collection and submit the final data object collection to the BL when the user saves... Rather than just delete/add/update everytime a row is changed.So my question is how do I maintain state for that datasource? I have tried this (delete example)
protected void lvMain_ItemCommand(object sender, ListViewCommandEventArgs e)
{
switch (e.CommandName)
{
case "Delete":
{[code]....
But it does nothing. I can't rebind it to the datasrouce because at this point the datasource is null.. I assume the listview keeps its own view state which contains the data?... I guess worse case I can always hold the Object Collection in a Session object.. ..
I have added a ListView to a web form and this code works when the data columns in the bound dataset have values:
<asp:ListView ID="picturesListView" runat="server"
GroupPlaceholderID="groupsGoHere"
ItemPlaceholderID="itemsGoHere"
[code]...
I'm new to asp.net. I have a page with formview to read, edit and insert data to sql server 2008. On the page there are textboxes, dropdownlists. The Dropdownlist1 is bound to a lookup table. I also have a pop-up page to add, delete and update data underlying table. The problem is after i insert a new record to the lookup table and close the pop-up page, rebind the dropdownlist on the parent page. I'm refreshing the page with window.opener.location.href ....
but i want only the refresh the dropdownlist on the parent page.
have a dropdownlist (ddl2) which is dependent on the selected value of another dropdownlist (ddl1).I have set the appendatabounditems to "true" for ddl2 and have added a "Please Select" and a "Select All" options. The Options show in the list when the page first loads. When ddl1 is selected the page refreshes and ddl2 is populated, however the "Please Select" and "Select All" options have disappeared.
View 7 RepliesI have a dropdownlist control in an edititemtemplate for a details view defined like this:
<asp:TemplateField HeaderText="Primary Use">
<EditItemTemplate>
<asp:DropDownList ID="ddlPrimaryUseEdit" runat="server" OnDataBinding="DropDownList_DataBinding"
[code]...
I have a datasource definded as a query to my database that has a column named "PrimaryUse". Sometimes there can be a value in the PrimaryUse column that isn't listed as one of the dropdownlist items and so my application crashes when trying to bind the dropdownlist's selectedvalue to that field. I'm trying to create code in the edititemtemplate's OnDataBinding event that will check if the value being returned from the datasource is a valid value listed as an item in the dropdownlist options. My problem is that I'm not sure how to get the datasources fieldvalue for that column in the behind code. Is this possible? Is so, can some one give me an example or point me in the direction on how to do this?So, in the OnDataBinding event for the edititemtemplate listed above, I would like to do the something like the following (psuedo code):
if datasource.datafieldvalue("PrimaryUse") is in dropdownlist.Items then Valid
else set dropdownlist.Selectedvalue = "Default"
I have a gridview in which I have two drop downs. One is populated with values that are static, so I have a regular sub that does that in the code behind. I tried to add code for databinding the other ddl to a datatable. I cannot get this to work. It just comes up empty. My asp code is fine, and the datatable definately has data in it - just nothing gets populated.
One other thing - the code for the static ddl has worked fine, but when I add this other block (either to the same sub as that, or dow the rowdatabound event) the static one doesn't work either.
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I am trying to create a Gridview in which I can update the Project Officer name in the Gridview from a DropDownList.
The Project Officer DDL comes from a seperate query (SqlProjectOfficerName) as the other information (SqlDataSource1)... as you can see below.
When I select EDIT, the DDL appears and I can select from the list of Project Officers, but when I select UPDATE, the name of the Project Officer doesnot change.
review the code below and assist as appropriate to write the Project Officer's name back to the table.
[Code]....
I have a webForm which host a gridview and a formview. The formview is used for showing/editing a record which the user Select from the gridview.
In the formview Edit template I used DropDownList controls with
SelectedValue='<% bind("datafield")%>'
for enabling the user easier interface. A few of the DropDownList controls need to have a list of 100 items and I want to load the items from code behind and not from the aspx.
I tried to update the DDL's from FormView.Load, FormView.ModeChanging, FormView.PreRender but
nothing I am getting an error like this:
[code]....
How do I load the DropDownList controls with items BEFORE the form databinding occurs.
Bringing back to life an old post that I dont believe ever got solved: http://forums.asp.net/t/1562245.aspxThis may be an old thread .... but no answer was ever given ... and I too have a radio button list and DDL and am stuck in the EXACT same place. If I check one of the two data bound radio buttons, the DDL should repopulate with a different set of results. This works just fine EXCEPT .... the DDL cannot be databound. If I set SELECTEDVALUE of the control to a bind I get this error:Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.I have followed the advice on this page from various users, all to no avail....surely this can be done, and I assume quite simply. Anyone know the answer?
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I have a formview that has several dropdownlists in the EditItemTemplate. Some of the dropdownlists are added using placeholders. I can add and populate their listitems without any problem. But when I update the record, none of the controls can be found--even though when I look at the page source they are there. I first strated out using asp:ControlParameter in my sqldatasource updateparameters, but even referencing the control as myform$mycontrol did nothing. So then I moved to code behind on the sqldatasource.updating event (code is attached). The only controls I cannot seem to bind to the update are those added via the placeholder.
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The item at the dim statement is not an item added using a placeholder and does not get a null reference exception (I used that to prove during debbugging that I wasn't losing my mind)--however, all the items being used to get the parameter values are getting null reference exceptions and are added via placeholders. Here is the code I'm using to set up the dropdownlists:
[Code]....
how to get the value of these controls so they can be used in my update?
I have created a ListView that has editing enabled, the wizard generated the table with the use of textboxes but i require the use of dropdown lists for some options. I have created the dropdown list
<asp:DropDownList ID="ActionStatusTextBox" runat="server">
<asp:ListItem Value="Ongoing">Ongoing</asp:ListItem>
<asp:ListItem Value="Open">Open</asp:ListItem>
<asp:ListItem Value="Closed">Closed</asp:ListItem>
</asp:DropDownList>
The drop down list generates successfully but doesn't submit and enter itself in the databse.
<%# Bind("ActionStatus") %>'
The above snippet needs to used somewhere in order to bind the data but which parameter does it need attaching to to pass the data?
i have dropdownlist of year which is coming dynamically.i have filled the dropdownlist using object datasource.on inserting in the listview control it is working fine. but when i click on edit button that dropdownlist value should be set which is coming from the database. e.g. if i have a row which contains Year=2006 and month="Jan"then on click on edit button these dropdown list should be fill up. i have written the code in ItemDataBound to set the value of the dropdownlilst.but when i use findcontrol its taking null so object reference error is coming.
View 2 RepliesI have various difficulties handling dropdownlist in listview itemtemplate.Hopefully, resolving this example will help me understand how to make things work.I need to do several things upon DropDownList1_SelectedIndexChanged.(1) Fetch row index of listview then set the row as listview selected, or vice versa, in which dropdownlist was changed.(2) Fetch text of namelabel in that selected listview row.(3) Fetch selected text of dropdownlist in that selected listview row.
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At the moment...(1) Label1.Text = ListView1.SelectedIndex always shows '-1' regardless in which row dropdownlist is selected/changed.(2) Label2.Text = NL.Text pops 'Object reference not set to an instance of an object'.(3) Label3.Text = DDL1.SelectedItem.Text pops 'Object reference not set to an instance of an object'.
i want to display two columns of a table in a single dropdownlist or a listview.
india ind
pakistan pak
australia aus
these two columns should display at same control which comes from same table...
I want to filter the table in my Listview (mvc2) using values from a dropdownlist shown at the top of the page. The values in the list are hard coded. Next to the dropdownlist I got a "Filter" button that calls the filter method on the controller / How can I pass the selected value from the list to the controller? for now I'm using a classic asp:dropdownlist
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i have list view and inside lisetview i have another list vie like nested listview
lv1 --> lv2 and inside lv2 i have button when i'll click buttion than insert template show but how can fine control lv2 ....? there is my code Lv1 is working but lv2 is creating problem..?
protected void lv1_ItemCommand(object sender, ListViewCommandEventArgs e)
{
if (e.CommandName == "NewRecord")
{
lv1.InsertItemPosition = InsertItemPosition.FirstItem;
}
}
protected void lv2_ItemCommand(object sender, ListViewCommandEventArgs e)
{
if (e.CommandName == "NewRecord")
{
//ListView lv2 = (ListView)e.Item.FindControl("lv2");
//lv2.InsertItemPosition = InsertItemPosition.FirstItem;
}
}
Last time I had problem in getting value from Dropdown List that located in the listview. I want to use the Jquery to get the value of thos Dropdown list and insert that data into the database,.
This time I have added some more radio buttun that are generated from my SQL server database and I want to use Jquery to get those radio button.
I have a listview that I am trying to initiate the connection string in codebehind. When I do it, I get the following error:The ConnectionString property has not been intialized.I know that I am successfully creating the connection string in codebehind because all other controls populate correctly from the dsame database.I do not get an error if I initiate the connection string in the html code.
View 6 RepliesDatabinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. error when I place a drop down list into my instert item template of my listview, but I have the exact same control in my edit view and it works fine, any reason I am getting this error? I know what it means but why would it work in the edit mode, and not the insert mode?
View 2 RepliesI have this code:
aspx
[Code]....
aspx.cs
[Code]....
Why can I not view anything in my dropdown list? It is totally blank
How can I populate a dropdownlist in an InsertItemTemplate in a ListView when it depends on another dropdownlist i.e. First DropDownList has a list of continents, once this one is selected DropDownList2 should be populated with the countries of the selected continent. Mind, of course both DropDownLists are inside the same InsertItemTemplate.
View 12 Repliesi have a listview linked to sqlDataSource1 and inside the listview in the itemtemplate i have a dropdownlist linked to another sqlDataSource2. in my item template I also have a button, I want to get the value that has been selected in the dropdownlist, click a button and launch a sql insert statement to insert data from the listview row and dropdowlist.selected value in another table.
how can I get data from the Dropdownlist, pass it to the "function()" in onItemCommand="function()" of my ListView instance, in order to achieve what I said before?.