Forms Data Controls :: DropDownList With Different Display And Selection List?
Oct 5, 2010
I have a problem with binding a DropDownList. Let's assume a database five years old with many historical records. In order to enable just working with active data every datasource has a column hidden which is occasionally set by administrator in order to clean up old records. The selection looks like
1) SELECT Id, Value FROM Table WHERE Hidden = 0
The issue arises when the user opens a form with old data. As some records in DropDownListhave have already been hidden an exception is raised as the component cannot find the data for the list. For this case the following selection is valid
2) SELECT Id, Value FROM Table
it is possible to combine these two selection queries? The display value should always use query 2 while the listed values should use the query 1.
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Feb 21, 2010
I'm having trouble figuring out how to display a gridview based on the selection of a drop down list. I manually entered the drop down list items, but in the configure/choose data source I don't understand how you make a relationship between each list item and the corresponding database table you want to show.
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Feb 19, 2014
i have a question, i ywant to know how to make if i pick an item from a drop down list it description goes to a textbox beside it automaticaly is very very important to me at this point
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Oct 4, 2010
I have a dropdown list in a gridview field. The DataValueField for the ddl is an 8 digit item code. The text to display through will be quite longer, 40-60 characters because it will combine the item code and item name into a single string. I don't want the dropdownlist field to be that wide though, only what is displayed when the ddl is selected.In Access you can set the width property of the list to display wider than the field itself. Is there that capability in ASP.NET and if so where do I find it?
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Sep 2, 2012
i have 2 DDL in my page that when users select item from ddldistric1 item in ddlcity1 will change these are my code
protected void DDLcity1_SelectedIndexChanged(object sender, EventArgs e)
{
BindDistrictC();
}
private void BindDistrictC()
[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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Jul 18, 2010
For my ASP.NET page, in the code behind I load various items/options into a DropDownList but I do not set a default by assigning SelectedIndex. I notice for the postback SelectedIndex is set to 0, even if I never set focus to or changed the value in the DropDownList.
If not otherwise specified in the code behind or markup, will a default value of 0 be used for the SelectedIndex in a postback with a DropDownList? If yes, is this part of the HTML standard for selection lists, or is this just the way it is implemented for ASP.NET?
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Dec 28, 2010
On my webform, i have one grid, 2 dropdownlist and one datepicker control.
When i select items from my both dropdown and date from datepicker control, i want to populate my grid based on above mention control selections.
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Sep 14, 2010
I have a dynamically generated dropdownlist, that lists e.g. Company Names. I want to be able to select a particular Company and display associated information e.g. Name, Address, City, State... etc. in text boxes adjacent to the list.
I am trying to fire the following code from the dropdownlist "OnSelectedIndexChanged" property, but cannot 1) get the code to fire upon selection, and 2) populate the text boxes...
[code]...
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Oct 27, 2010
Cannot populate the textbox with selection from dropdownlist
[Code]....
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Oct 30, 2010
I'm trying to filter data based on the selected value from a drop down list and the according values of a local variable within a gridview_rowdatabound event. For example, if "In Arrears" is selected, the gridview should return all rows where the account balance is less than -100. So far, when I select a value from the dropdown list, it has no effect on the gridview. Here's the code I have:
If (DropDownList1.SelectedIndex = 0) Then
e.Row.Visible = True
ElseIf ((DropDownList1.SelectedIndex = 1)
And (AccountBalance <= -100))
Then
e.Row.Visible = False
ElseIf ((DropDownList1.SelectedIndex = 2)
And (AccountBalance > 100)
And (AccountBalance < -100))
Then
e.Row.Visible = False
End
If
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Mar 17, 2011
This is my first post as a newbie to asp.net.
I am in the process of creating a "news system", you can add, edit and delete news. The news items can be entered into the SQL database and you select a category where you want the news item to go into.
What I want is when someone comes to the "Edit" screen, they have a drop down list and what that does is allows you to select a category for you to edit news items from, so rather than at present having the "Edit" page display all the news items, I want people to be able to choose a category that they can edit news items in.
So far my edit page has a datagrid with the following code:
[code]....
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Jul 5, 2010
I have a list box in a list view control. I want to access the value of the listbox. I have fixed the height of the list box and the box has scroll bars. If i change the number using the scrollbar and then click on the number (turning it blue) everthing works fine. If I simply change the number using the scrollbar the system throws the error below. Can anyone tell me how to get this to work simply by using the scrollbar to select the number (without having to also click on the number itself) This is the error that is thrown
[FormatException: ??????????????????]
Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberFormatInfo NumberFormat)
+201
Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) +66
[InvalidCastException: String "" ??? 'Integer' ??????????]
This is the aspx listbox
<td><asp:label id="Label1" runat="server" text='<%# eval("CustomerID") %>'></asp:label></td>
<td><asp:label id="label2" runat="server" text='<%# eval("ProductID") %>'></asp:label></td>
<td>
<asp:ListBox ID="ListBox1" runat="server" Height="30px">
<asp:ListItem Value="0">0</asp:ListItem>
<asp:ListItem Value="1">1</asp:ListItem>
<asp:ListItem Value="2">2</asp:ListItem>
<asp:ListItem Value="3">3</asp:ListItem>
</asp:ListBox>
</td>
<td>$<asp:label id="label4" runat="server" text='<%# eval("OrderDate") %>'></asp:label></td>
<td>
<asp:Button ID="Button1" runat="server" Text="order" CommandName="cart"
CommandArgument='<%# eval("CustomerID")%>'/></td>
This is the vb page
Partial Class Droplist
Inherits System.Web.UI.Page
Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
Dim db As New DataClassesDataContext
ListView1.DataSource = db.Droplist1
ListView1.DataBind()
End If
End Sub
Sub upload(ByVal sender As Object, ByVal e As ListViewCommandEventArgs)
If e.CommandName = "cart" Then
Dim q As ListBox = e.Item.FindControl("Listbox1")
Dim ProductNumber As Integer = CType(q.SelectedValue, Integer)
Label3.Text = ProductNumber
End If
End Sub
End Class
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Dec 30, 2010
i want to update data in my table..for which i want to select drop down list value automatically when i click on Select button in my griedview.my drop down list contains City names and that data is shown in griedview, so when i am clicking on select button on particular row in griedview i want to make that city selected in drop down list..my Dropdown list id is "drpCity" and griedview ID is "GrdCity"
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Feb 17, 2011
I have EntityDataSource for DetailsView which is in Edit mode by default (showin Update, Cancel link buttons).
This datasource also has foreign key called PecID. If I change the value in textbox bound to PecID, it works fine.
Entering IDs is not very user friendly, so I add dropdownlist and new datasource.
When I select new value from dropDownList and press update the DropDownList's selection is restored to original (previous) value.
Other values in textboxes are saved as expected.
After few hours of trying to figure out what is going on, I got lucky. I figure out that it is important the order of TextBox and DropDownList in field template.
This is the working order (textbox before DropDownList)
[Code]....
This one doesn't work [Code]....
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Feb 15, 2011
I would like the user to select an item from a drop down list. Next to the drop down is a textbox or label control. From the ddl selection I would like to populate the textbox or label from a database with a corresponding field from the database the dropdownlist was populated from. On selectindexchange event I can populate the textbox with the Unique id from the value, but I need to input a different field into the textbox. Can I use some sort of variable to assign the Textbox.Text = ?
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Apr 24, 2010
I have a Gridview with a parameterized SQLdatasource. I want the Gridview to be filter when the a selection is made from the dropdown list Here is what I have. I am missing something.
<asp:SqlDataSource ID="SqlDSAlbums" runat="server"
ConnectionString="<%$ ConnectionStrings:Default %>"
SelectCommand="SELECT Album.Album, genre.Genre, Band.Band, Album.year, Album.AlbumUID FROM Album INNER JOIN Band ON Album.BandUID = Band.BandUID LEFT OUTER JOIN genre ON Album.GenreUID = genre.GenreUID WHERE (genre.Genre = @Genre) OR (genre.Genre <
'ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ') ORDER BY genre.Genre, Band.Band"
ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>">
<SelectParameters>
<asp:ControlParameter ControlID="ddlGenre" Name="Genre"
PropertyName="SelectedValue" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDSGenre" runat="server"
ConnectionString="<%$ ConnectionStrings:Default %>"
SelectCommand="SELECT Genre, GenreUID FROM genre Order by Genre"></asp:SqlDataSource>
Select a Genre
<asp:DropDownList ID="ddlGenre" runat="server" DataSourceID="SqlDSGenre"
DataTextField="Genre" DataValueField="Genre" AppendDataBoundItems="True"
AutoPostBack="True">
</asp:DropDownList>
<asp:GridView ID="gvAlbum" runat="server" AllowPaging="True"
AllowSorting="True" AutoGenerateColumns="False" DataSourceID="SqlDSAlbums">
<Columns>
<asp:BoundField DataField="Album" HeaderText="Album" SortExpression="Album" />
<asp:BoundField DataField="Genre" HeaderText="Genre" SortExpression="Genre" />
<asp:BoundField DataField="Band" HeaderText="Band" SortExpression="Band" />
<asp:BoundField DataField="year" HeaderText="Year"
SortExpression="year" />
<asp:TemplateField HeaderText="Comments">
<ItemTemplate>
<asp:HyperLink ID="hlToComments" HeaderText="Comments" runat="server" NavigateUrl='<%# String.Format("ViewComments.aspx?AlbumUID={0}", Eval("AlbumUID")) %>' Text="Click Here" />
</ItemTemplate>
</asp:TemplateField>
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Feb 26, 2010
I have a gridview that displays the data of my database. What i want is a detailsview that gives me the details of the record i select in the gridview. Both the gridview and the detailsview are on one page. I use objectdatasources to get the data from the database. In the ObjectDataSource i select the gridview-control to get the selected value. But i get the following error: An object of type System.String can not be converted to DataTable. I also tried the following:
leaving the ODS control to none and passing the value via the protected sub ObjectDataSourceDetails_Selecting:
e.inputparameter("id") = gridview1.SelectedValue
The problem is this: when i click on select in the gridview, the data won't display any data in the detailsview.How could i solve this?
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Jan 3, 2011
i want to see the sales in the grid view based on the month selected from drop down list. Ex: when I select June 2010 from the ddl box, the sales for that month are correctly displayed in the grid view. I go to page 4 to look at some sales there and then switch the month to August 2010 to see sales for that month instead. Here is the problem. When I switch the month, it show August 2010 sales, but stays in page 4 instead of going back/resetting back to page 1 of August 2010 sales.
How do I reset the grid view page back to the first page of August 2010 sales?
I am fairly new to ASP. If I have missed an imp. detail in this post, let me know and I will get that info. out there.
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Jan 4, 2011
I have drop down selection box as follow...
1 - Car
2 - Plane
3 - Train.
Now, based on user selection say, 'Car', I want to display Help text associated with selection on page. Help text description - 1000 characters. Now, how do I fetch Help Text Description from? should I store in Session scope or Application Scope or fetch from Database based on drop down selection.
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Dec 2, 2010
I have a gridview with 50 rows. I want to display the rows according to the selection in dropdownlist. Say for ex - In my dropdown i have items 10,20,30,40,50. If i select 20 grid should display only 20 rows.
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May 7, 2015
in our project we need to show the markers on Google map from the database. we have already got the code in which all the markers are displayed for the the places stored in database. But our aim is somewhat different.We need marker on one place that is selected from the database.to elaborate,if we select an area from the dropdownlist that contains names of areas stored in database,then "only" marker on that place must be displayed.Further,selecting the subarea from dropdownlist2 should zoom the map and display a marker on that subarea.so how do we do that? what are the changes required to be made in this code?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
[code]...
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Mar 28, 2011
I have more than 50 counties in DropDownList. Instead of entering all the 50 counties into DropDownList, Is there any other way, that give best results.?
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May 7, 2015
How to set textbox value based on dropdownlist in asp.net?
Eg: DropDown Option: * Small
*Medium
If I select Small I need textbox value as 50 and For medium 100 something like this.
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May 7, 2015
I have two tables :
1- Builder
2- Project
Structure of Builder Table :
ID INT PK Autogenerated
Name nvarchar(50)
Structure of Project Table :
ID INT PK Autogenerated
BuilderID INT
ProjectName nvarchar(50)
Now i have a dropdown combo which is manually binded to Builder Table , what i want is that it would disable all those builders in the dropdown to be selected which are residing in Project Table.
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