Web Forms :: How To Bind Two Drop Down Lists In .Net In Visual Studio Using Formview Insert Template Using C#
Aug 9, 2010
I am using C#, Object Data Source, formview and a BLL. I have two drop down lists and two data sources. One populates the other. Drop down list #1 populates Drop Down list # 2 based on its selection . Drop down list # 1 is populated with DataSource #1. Forview is using DataSource #3 to send the ietms. When I add: SelectedValue='<%#Bind("Make_ID") %>', I get the error below:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control
I have seen a solution online but it is using LINQ and I am not familiar with it. I need to find the selected value of the drop down lists.
I want to change the default formview generated template. I don't mean change the itemtemple on each page, I mean what VS generates when ever you databind the formview. I want to change it so it uses <label...>xxx</label> instead of xxx <asp....
I have a formview with various templates set up for a database that has 255 columns. I need the insertitemtemplate to pre-fill values based upon a specific selection by the user (just like the edit item template) but when the template is switched to insertitemtemplate every text box is cleared. The idea is that a new entry is usually made by making minor changes to an existing entry. With 255 fields I don't want to require the user to enter every field when only three or four need to change.
And the following generic control template writer (which would have to be extended appropriately)
[Code]....
I would like to be able to add an attribute either builtin or something I create, such as
[Code]....
The generic template writer would then automatically create a Select box instead of a textbox for this item, and populate it with the list I have passed.
There may need to be another property set to have it write option boxes or radio buttons.
The question has two parts: (1) Is this an appropriate metaphor? and (2) Can you point me to an example that does this or to an appropriate metaphor.
What I want is a generic control writer that looks at the type of the object, writes the appropriate html, and a way to pass in external data for things like lists and enums.
I have a Formview residing inside am Item Template of a Gridview. The formview is not populating, and I am pretty convinced that I am not passing the parameter properly from the Gridview to the Formview. I have listed the relevant code only, so that you can scan though it easierGridview tag:
I have a web form for handling invoices which has a form view. When I'm in insert item template, I need to have various fields. Some of them are contract number, invoice number, register date and other that are easy to handle. But there is a dropdown list related with a table of prices (the table has price name, price initial payment, number of payments, amount of month fee and so on). So, when the dropdown is selected, fields related with price should get their values from price table, and then the user decides to keep them or type in new values. How can I get it done? Should I use a Dynamic populate extender or type all the code behind using SelectedIndexChanged method to populate price related controls?
How can I have 2 Cascading Drop Down Lists for the same Drop Down List?here is my problemi have 3 drop down lists read from database1- Schools List 2- Classes List3- Teachers ListEvery School will have more than 1 Class and more than 1 TeacherWhat I want is when user select a School from Schools Drop Down List then BOTH (Classes and Teachers) should be refreshed based on the School Drop Down List
I would like to set the one template for edit/insert and view in my custom FormView control . But i got these odd exception Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.Table'.
public class CustomFormView : FormView { [PersistenceMode(PersistenceMode.InnerProperty), TemplateContainer(typeof(FormView), BindingDirection.TwoWay)] public IBindableTemplate FormTemplate { get; set; } protected override void OnInit(EventArgs e) { ChangeMode(FormViewMode.Edit); if (FormTemplate != null) { if (CurrentMode == FormViewMode.Edit) { FormTemplate.InstantiateIn(this); } } base.OnInit(e); } } edited : in the first step , I created the new user control and added a formview ("FV") public partial class Form : UserControl { private IBindableTemplate _template = null; [PersistenceMode(PersistenceMode.InnerProperty), TemplateContainer(typeof(FormView), System.ComponentModel.BindingDirection.TwoWay)] public IBindableTemplate FormTemplate { set;get } protected void Page_Init() { if (FormTemplate != null) { FV.InsertItemTemplate = FV.EditItemTemplate = FormTemplate; if (!IsPostBack) FormTemplate.InstantiateIn(FV); } } }
Now , I want to convert this user control to web control.
I am trying to debug a project, suddenly I'm running into an issue where enumerating any object collections results in a timeout if I try to view it.If I run the program normally I have no issues. If I try to view any collection, such as a list, I get a timeout error and the whole thing bombs out.I thought something might be going on with one of my more complex collections so I tried creating just a normal list of strings as follows...
List<string> blah = new List<string>{"fsdf","fsdg","Gt","gsersg","ser","gersgxdrsd"};
I am using a formview to show data, with edit, insert and delete enabled. My problem is with the insert.When i click the insert, the formview changes fine to the template for inserting new data, the problem is it was allowing the user to insert the ID themselves, I have made this readonly, but how would i go about ensuring the ID key is made the next number in line? and that it is printed to this textbox?
I'm totally new to ASP.NET ( as a VC++ 6.0 engineer ), I have just downloaded the express edition of 2010 web developer and cannot find for the life of me the correct project template to create an ASP.NET webservice.. in 2008 it appears there is an option for this .. however I cannot find it in 2010..
this sound may too easy, but for a person who has no idea about the asp.net is not. I am using visual studio 2008 and I want to add a drop down menu in my page. does any body have any idea how to add this please? The dropdown menu should be linked to a table from an access database since I am going to collect the data with C# therefore I decided to post in in this forum.
I tried using the the New ASP.NET Default Web Template in Visual Studio 2010 but one issue I'm encountering is with the CSS selected menu item and read apost which stated that...
"This screenshot demonstrates some of the styling options provided by the CSS, including the style for the selected About menu item"...In the screenshot the "About Us" menu item is highlighted but the page's content is the "Home" page content, not "About Us" page. My problem is...I can't get the selected item to be highlighted as in the screenshot even with fresh site using the built in template.
I have a page that has a data grid and about 25 drop down lists.The datagrid displays Name and has an id col not visible. I was thinking that whan the user selects the select link button on the grid to then get all the data for all the ddl and populate the list and select the value or multiple values for that specific name that was selected. Thinking of it seems more like i should populate all the ddl and when a grid name is selected only get the keys for that specifc record and then mark the ddl items per that name. there are lots of ddl and lots of data, im not really sure the best way to proced. Any ideas appreciated. I have a table with id typeId and Name that contains all of the data for the drop down list (different types of service providers , (plumbers, elec)I was thinking of selecting everything from that table and then in the page applying a filter by service provider type and using that to populate the ddls.
my one table consists of fields (id, flying from, flying to). thus i have one drop down for flying from and another drop down for flying to. i'm hoping to cascade them so 2nd drop down values are dependant on the values from 1st drop down. is it possible to do this using a single table? or must i use two tables and link the id's from both? and do i write anyting in the SelectedIndexChange event? the sqldatasource code looks like this:Flying From:
I'm using visual web developer and MS.Access and have the following created. 1. A formview control to enter data into the database 2. A File upload control that allows users to upload files. But however i'm unable to include the file upload control in the formview control. How can i achieve this? Below is the code for the page:
I have 40 Drop Down Lists that I want to fill using an XML file. Based on what is in the XML file i will add an item to a specific Drop down list. I don't want to manually loop thorugh each control by name. the ids for all of the controls start with DDLSession and then they have a suffix such as A2 or B4. What I want to do in the C# Code is ads items dynamically to the control like this:
I'm using VWD with a database back end. I have a list of teams which are marked off by league, level, division, teamid and then using gridview for the list of players per teams.I've got the drop downs working correctly but running into a little snag and that is on the auto postback.When I only have one option come up in a list, i obviously don't change that list and thus it doesn't change the next drop down because there is no post back. is there a way to use a "header" value?
When I click on New Project-> Visual Basic (or C#)-> Web, the only options i get is AjaxControlExtender, AjaxServerControl and ASP.Net Server Control. How do i get the ASP.Net WebApplication option to show up?
I'm trying to learn ASP.NET MVC, but have discovered that I don't even have the ASP.NET MVC 2 Web Application template installed. I'm using VS 2010 Ultimate (10.0.30319.1 RTMRel). How do I get this installed so I can begin?
In Visual Studio 2010, I don't see the Visual Studio installed template to create an ASP .Net Web Service Website (when I click on File->New->Web Site..) if the target framework is 4.0. However if I switch to FW 3.5 or lower, I do see the template.
Today in one of the computer i installed visual studio 2010 professional edition, and successfully installed. But in my new project template "Asp.net MVC 2 website" is missing. Also I'm not able to open an already created MVC 2 project also. I'm also having MVC 2 installed with VS 2008 Sp1 in the same machine and is working fine. I uninstalled and installed again, the same is happening.
I just installed Visual Studio 2010 on my Windows 7 laptop in order to start learning the Entity Framework. For some reason that I haven't been able to figure out, when I try to add a new item, there is no template for the ADO.NET Entity Framework. Why the template doesn't exist and what I need to do in order to get the template? I came across a post that stated that in order restore the template that I needed to do the following: devenv /installvstemplates
