Data Controls :: Implement Dependent Cascading DropDownList In GridView TemplateField
Dec 23, 2013
How do I fill ProductNameID on selection of ProductCategoryID dropdown by passing
ProductCategoryID .SelectedValue...
aspx Code
<asp:GridView ID="gridPosition" runat="server" AutoGenerateColumns="False" ShowFooter="True" OnRowDataBound="gridPosition_onRowDataBound"
DataKeyNames="SaleDetailID" OnRowEditing="gridPosition_RowEditing"
OnRowCancelingEdit="gridPosition_RowCancelingEdit" OnRowUpdating="gridPosition_RowUpdating"
OnRowDeleting="gridPosition_RowDeleting" ShowHeaderWhenEmpty="True" CssClass="manage-admin"
Width="500px" GridLines="None">
[Code] .....
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Jun 16, 2015
I have question how can make cascading dropdownlist in gridview edit mode
the first dropdown is for departments and second is for classes
the primary table to be updated is employees table
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May 7, 2015
I have two dropdownlists inside a repeater. And based on the value I pick in the first dropdownlist the second needs to get populated (both need to be populated from the DB via stored proc). I am adding the code I have so far but it's not complete
<asp:Repeater ID="rpt" runat="server" OnItemDataBound="rpt_ItemDataBound">
<ItemTemplate>
<tr>
[Code].....
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May 10, 2012
I have two comboboxes say DDL 1 : Artist , DDL 2: Albums and a Gridview containing ( album name, artist name, no.of tracks, year, etc), What I want to achieve is: when an option(artist1) in DDL1 is chosed, then the albums related to DDL1 needs to display in DDL 2 and also it must update the appropriate values in the gridview( artistname, albums(album name -no of songs, year)etc...(language: Asp.net(VB)-Sql server ).
I looked at your article regarding cascading dropdownlists and was really useful but in my case I want to use two drop down lists and a grid view.
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Nov 15, 2011
I want to implement Cascading dropdownlist in ASP.Net GridView
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Jul 2, 2010
GridViewDetails uses templatefields. In edittemplate I put a button called "ButtonUpdateAdjustAmount" with OnClick="Update_AdjustAmount" in the EditItemTemplate for the "Amt to be Adj" column. There is also a textbox. My user's should be able to edit the textbox, but I also want the ability to click the button and the textbox populated with the correct calculated value. The formula varies based on the "code" column which is a dropdownlist called "DropListCode".
I am fairly new to asp.net, vb, etc...so forgive my code writing. Eventually I need to also put the same functionality on the insertrow for my gridview. But first wanted to get the edit one working. I am using templatefields for all columns and the FooterTemplate to perform the Insert New Detail Line.
I can get the functionality to work for the first data row and only if I take out the If code.SelectedValue = ... line and leave 1 static formula. However that isn't going to work. If DropListCode.SelectedValue is DNR then AdjAmt should be ((q_ordered - q_received) * cost). If DropListCode. SelectedValue is OV then AdjAmt should be (RKNumber * cost). If DropListCode.SelectedValue is NB the AdjAmt should be ((q_received - q_ordered) * cost). If DropListCode.SelectedValue is DAM then AdjAmt should be (RKNumber * cost)
Code behind for the OnClick:
[Code]....
.aspx page - GridViewDetails programming:
[Code]....
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May 21, 2010
I have a gridview with a DropDownList (contained in a TemplateField). I have set the OnSelectedIndexChanged event to a function called "ddlAgent_SelectedIndexChanged" This allows me to aquire when a user has changed the value for the dropdownlist. What I need to do is persist this newly selected value to the database for the gridview record. The problem I'm having is how to I get the datakeyNames value for that row? See code below!
TemplateField source
<asp:TemplateField HeaderText="Agent">
<ItemTemplate>
<asp:DropDownList ID="ddlAgent" runat="server" AutoPostBack="False" OnSelectedIndexChanged="ddlAgent_SelectedIndexChanged">
</asp:DropDownList>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:TemplateField>
ddlAgent_SelectedIndexChanged
Protected Sub ddlAgent_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim gvItems As DropDownList = CType(sender, DropDownList)
' Write the selected Agent ID to the Inquiry record.
'Dim ID As Integer = gvMaint.DataKeyNames(e.SelectedIndex).Value ' THIS FAILS BECAUSE
e.SelectedIndex is not part of System.EventArgs
End Sub
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Feb 23, 2010
I am trying to bind the datasource of a ddl which is located inside the EditTemplate of a TemplateField.When is the best time to bind this datasource (after loading grid, before editing, ? (Note: I must do this in code behind).I am currently trying to bind it on the edit command:
[Code]....
The issue is that the list retrieved from the LoadLists method is null when passing to the LoadList method where the datasource is bound.
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Jul 6, 2010
implementing cascading static dropdownlist in asp.net
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Sep 6, 2010
I need to create a TemplateField column dynamically , which will contain dropdowlist controls. I've been using this
example to create my first dynamic columns and for the last column, the one that contains dropdowlist controls, I've written this class:
[Code]....
But what I don't know is, where should I populate the dropdownlist control?
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Oct 8, 2010
i'm trying to implement a cascading dropdownlist inside a partial view.
this is the code:
[code]....
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Jan 8, 2013
I am having two dropdownlist in my project,one dropdownlist for empid, another dropdownlist for month, if the user select the empid, the values are retrieved in the textbox.
In the second dropdownlist, if the user select the month in the dropdownlist it will display the leave details, its all working fine, if the user again select the first dropdownlist that means empid, I want to show the second dropdownlist as select month, how can do this.....
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Dec 4, 2010
I've got 3 SqlDataSource controls, and 2 dropdownlists and 1 detailsview on a page. The first SqlDataSource is associated with the first dropdownlist, and second SqlDataSource (which is filtered based upon the selection chosen in the first dropdownlist) is associated with the second dropdownlist and the third SqlDataSource (which is filtered both by the selection of the first dropdownlist and the second dropdownlist) is associated with the detailsview. The idea is the user selects something in the first dropdownlist, and it is supposed to update what is returned by the second SqlDataSource control and second dropdownlist, and that in turn is supposed to change what is returned in the third SqlDataSource control and it's associated detailsview. All of the dropdownlists have AutoPostback set to True.
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Aug 21, 2010
I'm trying gridview templateField DropDownList bind with arraylist. When i set bindsource i got this error. "//Error Object reference not set to an instance of an object."
My Sample .aspx
<asp:TemplateField HeaderText="Type">
<FooterTemplate>
<asp:DropDownList ID="_grvcboType" runat="server" Width="117px" DataTextField="Display" DataValueField="Value">
</asp:DropDownList>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="Label7" runat="server" Text='<%# Bind("Type") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
[Code]....
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Apr 19, 2012
I have 5 dropdown list (sector-country-year-project code-project title) so what i need is when i select specific sector for example education , the rest of the label should show me the only data related to the sector education in dropdown list. the same with other if i select year 2011 should show me in other dropdown list just the data related to year 2011.
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Jan 5, 2013
I have 2 dropdownlist in my page
1--ddlTarde
2--ddlTradeClass
and 2 table in database
1-Trade table
ID Tname
1 Industry
2 Cloth
2-Tradeclass
ID Class Tname
1 Electronic Industry
2 Car Industry
3 Scarf Cloth
4 Pants Cloth
I bind ddlTrade from Tradetable and I want when users click on Item from ddlTrade it bind data from ddlTradeclass that TNAME=ddlTrade.selectedItem in ddltradeClass for this I used below code
for binding ddltrade
BindDropDownList(DDLtrade, "tradename", "Name", "id");
protected void BindDropDownList(DropDownList DDL, string spname, string dataTextfield, string dataValuefield) {
SqlCommand _cmd = new SqlCommand(spname, _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cn.Open();
SqlDataReader _dr = _cmd.ExecuteReader();
[Code] ....
NOW my problem is that when I select Item from ddlTrade it didn't show any thing in ddlTradeClass but when I delete this code
DDL.DataValueField=dataValuefield;
from BindDropDownList Metod and change like below:
protected void BindDropDownList(DropDownList DDL, string spname, string dataTextfield)
{
SqlCommand _cmd = new SqlCommand(spname, _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cn.Open();
[Code] ....
It worked correctly I mean when I click Item from ddlTrade in ddlTradeClass show data from TradeClass Table
so here what should I do ? I need DataValueField in ddlbinding ... Why this problem happen?
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Mar 16, 2011
I have 2 dropdownlists and on change 1st dropdownlist (ddlPlant), the 2nd dropdownlist (ddlCategoryName) refreshes its data based on 1st dropdownlist value. However, the codes does not worked.
My codes:
[Code]....
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Mar 2, 2010
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.
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Feb 9, 2011
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.
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Nov 21, 2012
is there any easy way to add city names,state names,and country names in dropdownlist..
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Sep 20, 2012
Using four dropdown lists (country, state, city, pincode) in one table. i want to select one after other like based upon the country, states has to be displayed and based upon the states, cities has to be displayed and based upon the cities , pincode has to display.
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Apr 27, 2016
Into my application there is EditAds.aspx page where the user get a link on his email after he add an Ad into my application. My inquiry is can i bind the cascading ddl to show the value of State column into Ad/product row as well if the user want to update the rest of state will be also reachable. It maybe hard to get what i am looking for exactly so i make a short screen record ...
Rebinding values of Ad/product depending on AdsID which is a query string in the page called: QADNUM
[URL] ....
if (!IsPostBack)
{
if (cookie["Location"] == null)
{
DataTable rEfilterstathpBizDT = new DataTable();
using (SqlConnection REGGfilterstathpBizCon = new SqlConnection(sc))
[Code] ......
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Jun 20, 2010
I want to create simple rating page where player's place,name and rating is displayed. I've created database with ID,Name and Rating Columns, binded Gridview to this database and created TemplateField "Place". With following code I've created numbered list for Place:
protected void Page_Load(object sender, EventArgs e){
for (int i = 0; i < GridView1.Rows.Count; i++)
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Nov 23, 2010
I have a GridView, bound to a table (Meals) in a SqlDataSource.
Into that GridView, I have added a TemplateField, which contains a DropDownList (which displays the numbers 1 - 10, added manually; no Data Binding). And, I've added a ButtonField.
When I click the Button, I want the values of some of the GridView rows PLUS whatever value was selected in the DropDownList to be pulled out and stored in a second Sql table (Orders).
Pulling the rows bound to the SqlDataSource is easy but JavaScript is needed (I think) to pull the SelectedValue from the DropDownList. I understand women more than understand JavaScript (that's how little I know) and the code below has been kindly offered by another forum user who is at a loss, himself, now.
Here's the code and the error message I'm getting.
ASPX:
[Code]....
And here's the Code Behind:
[Code]....
No design time errors reported but here's the run time error:
Object reference not set to an instance of an object.
On the following line:
Line 28: if (row.RowType == DataControlRowType.DataRow)
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Mar 11, 2011
[Code]....
[Code]....
I want to add two image button in the TemplateField.. and add it in the gridview.
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