Develop Reference

How to pass selected list value from popup into a textbox using C# webforms?

I have a table called Vendor that has two columns: VendorNum & VendorName.
Is there a way to create a list or a listbox or a listview that when a button is clicked, this vendor list will pop up. Then the selected popup list's row will pass the selected VendorNum into a textbox that's in the parent page..
I only know GridView has the select row option, but is it a proper way to put the gridview into a Listbox so the list can be scrolled up/down all within a fixed box?

You might want to take a look at the ListBox.SelectValue and/or ListBox.SelectedItem properties

How to create a gridview in asp.net having features similar to the datagridview in Windows forms

I understand that the Gridview of asp.net and windows forms are different, but my requirement is that I have a registration form where in a user registers his vehicles.
A single user can have many vehicles, so I want to provide a Gridview with the column names specified and allow users to enter the values in the rows. Depending on the number of vehicles, the user keeps adding them. This task is actually easy in the Windows forms since the grid is in such a way that an empty row is provided by default and we can type in the cells. Finally we can read the DataGridview by each row and save the results to database.
I am looking for this feature in the Asp.net either with the Gridview or any other data control. This looks pretty complex with the asp.net gridview since ill need to work with the edit button, update button for doing this every time and also a add new row button every time.
Is there any other way I can do this task without complexity. I am fairly new to asp.net.

If you want to add a new row then what you can do it add a footer row to the gridview. and everytime the user enter information in the footer row you can bind it to gridview and when the page is reloaded you will always have the footer row. This way user can register as many cars they want.

Problem with dynamically added subheader into custom GridView

I'd like to get a grid with ability to add subheader (one or several rows) according to value of certain column (data source is grouped sorted by this column). Within my inherited GridView I override OnRowDataBind method: If value of considering column on current call of OnRowDataBind is not equal to previous values, then special header row is inserted before current row.
Table tbl = this.Controls[0] as Table; //this - pointer to CustomGridView
tbl.Controls.AddAt(rowIndex + add_counter + 1, NewSubHeaderRow); /*rowIndex - RowIndex of current row, add_counter - amount of already added SubHrader rows */
All works right. But problem occures on postback, when GridView restores it's state. First row and all its controls into every group (other words, first row after each dynamically added subheader row) comes without any attributes. But second row in group keeps both its own attributes and attributes of first row.
Some help will be very usefull. Maybe there is another (and right) way to add row into GridView. Then please, provide me with links to tutorials or articles.

Dynamic controls disappear on postback because on postback framework doesn't have information about such controls. It's programmer's responsibility to keep track of these dynamic controls and recreate them after postback...
Please refer to following post for re-creating dynamic controls on postback:
FAQ: Why do dynamic controls disappear on postback

Thanks for Waqas.
Here is my decision.
I override CreateChild(datasource, isBinding) and create list where put index of row, before which you should add subheader row. On SaveViewState i add this list to sealized object. On Load ViewState i load this list and if it's not null create subheader rows by saved indexes.
Maybe, there is a simpler and more natural way. But it's hidden from me securely )))

Editable GridView Distinct Drop Down LIsts

I have a simple app I am messing around with its a basic Master/Details layout.
The details panel is actually a tab panel and on one of the tab panels it has a GridView. Within that grid view it shows the "current" in database information with all cells as read only.
alt text http://lh4.ggpht.com/_JU1W2P96pD4/TAeonNNYXgI/AAAAAAAAAq0/Y_-Kse7VObE/ExampleA.jpg
I then have an add button that inserts a row into the GriView and allows the user to enter some information. The first item in my GridView is a DropDownList, which is populated from an ObjectDataSource. This drop down is basically my unique index and there can only be one selected value per GridView.
alt text http://lh3.ggpht.com/_JU1W2P96pD4/TAeonIF3DdI/AAAAAAAAAq4/JhfOTsHgsf8/ExampleWithDropDown.png
What is the best way to remove the values from the list that are already in the GridView? Do I just need to remove the data source and add a OnDataBinding method that iterates through the grid view and generates a valid list of values?
I can't use a service method because if the user adds two rows they would have the option to insert duplicates description types.
Just want to make sure there is not a better way to do this.

Keep the object datasource, which I am assuming is an IEnumerable object, in a Session variable. When someone selects a certain value remove that value from the list in the session variable. Whenever they activate the form where the drop down list is displayed simply rebind the control to the list in the session variable. It will be easier than looping through the grid every time the user adds an entry.

Display ASP.NET GridView inside a selected row in another GridView

I have been given a mockup that I do not know is possible to code in ASP.NET without being a real html and javascript wizard.
I want a GridView that when a row is selected, the selected row expands and below the selected row a panel of additional information is shown, which would also include another small GridView. The idea is this would all be in-line. So if the user selected row 4, then the additional information would appear below row 4 and then after the additional information the parent GridView would continue with row 5.
Ultimately I would want to do a multi-select type of set up, but first I need to figure out if this is even possible. Also, the solution must be 508 Compliant
The one solution I considered was using only one "column". Then I would put all my fields in the ItemTemplate, and my detail panel content in the EditItemTemplate and instead of selecting the row, set it to edit mode. The problem with this solution is I lose the functionality of multiple columns if I throw everything in one huge ItemTemplate.
Any and all suggestions or ideas are appreciated.

What you're describing would be best fulfilled with a ListView control. It takes a little more templating work to set up than a grid view, but you have much more control over it and you can emulate the look of a GridView. You would set your Selected Item template to contain another ListView (or GridView) thats bound to your detailed data.

I've done this using a gridview inside a ListView and using ajaxcontroltoolkit collapsible panel
Your parent list would be a listview that would have 2 table rows for each item, on the first row your parent column, on the second row use colspan and add a gridview wrapped on a collapsible panel