Web Forms :: Can Use LINQ To Get Filtered List Of Controls
Sep 20, 2010
I have zero experience with LINQ but had occasion to use it today. I implemented a working solution but do have a question.First, let me provide the background:I have 20 large web pages that altogether have several hundred data input controls on them. There are strong similarities between how each type of control is handled. Rather than wire up each control individually (ie. hard code it in the layout page)
foreach (View view in multiView.Controls)
foreach (Control ctrl in view.Controls)
switch (ctrl.GetType().Name)
case "DropDownList":
DropDownList ddList = (DropDownList)ctrl;
[code]...
I can see the issue here but can't get my head around a dv and dv.Table unless I'm looking too deep into this.Essentially, I can't get AsEnumerable.Sum() on dv but on dv.Table but I need it on the filtered view (ie. dv).This is the framework the entire application is built on so I can't pass these parameters to the stored procedure! Well I could but cannot be bothered re-writing and testing eveyrthing!
I use a GridView control in my web part to display data from sql server. I use the filter in this GridView. Can I only get those rows that are filtered. If I use GridView.Rows, it returns all data it got, Not only the filtered data.
am having three dropdownlists on my webform. On the based on their selection I am retriving records from a databas table. my code for retrieving records as follows.when I didnt select ant dropdownlist ans click the search button then it featch all records. but when i select an option from suppose i select from ddlDivision, even there is many records related to selected Division but it shows sorry no record found.
I am working with GridView/TelerikGrid control. It is having filter option. When I filter the data, I need to copy only filtered rows into Datatable for further processing.
Suppose I am having total 10,000 records. and when I filter on column say Dept="IT", I get 1000 records in grid. So these 1000 records only should get copied into Datatable. So How to achieve this ?
Cwhat can be done over this ? I tried number of properties for grid. But there is no property which will return fileterd data source. Also I am not able to go every page of Datagrid and collect the data. I can get data for first page only. If I need to collect the data by going to every page of gridview, what is the way for this ?
'm using a gridview with paging and sorting in asp.net (language = VB).The gridview shows all the artists in my database. I've added a searchbox above my gridview, so users can search for certain artists by name.The search option works. If I enter the name: John --> it shows the artists who have the name John.Now for the problem:If the user filtered the gridview (for eample searching for John) and switches to another page of the gridview, the gridview is again filled with all the artists instead of the artists that are named John.
Is there a way to use linq to get a list of textboxes in a web page regardless of their position in the tree hierarchy or containers. So instead of looping through the ControlCollection of each container to find the textboxes, do the same thing in linq, maybe in a single linq statement?
I have a SQL data source control defined to filter data from a SQL database, sorted according to the date time in descending order. When i try and update a field of the latest record, the entire column, related to the field of the filtered search gets modified. I want to only update a field of the last record i.e. the last entry of the filtered data. How can i achieve it?
My page has ListView with SqlDataSource. I set SqlDataSource as DataSet and EnableCaching = True.
BEFORE I filter SqlDataSource, I don't have problem to get the record value for selected record data in my ListView.
AFTER I filter SqlDataSource, my ListView can display the filter record data properly, but I have problem to get the record value for selected record data in my ListView. The record value for selected record data does not refer to the record value what I am selecting.
I am trying to export a gridview that is returned from a search form. The gridview also has paging enabled. When the searched records are found in gridview it is exporting all data.instead of exporting only the searched data.
How can I only export the records from the search results, but also the make sure the records on the different pages export also?
I have implemented excellent code for saving Gridview to Excel, CSV, Word.
I also have a Dropdown control that filters rows by selected values in a specific column, and then only rows with the selected values are displayed in the Gridview.
However when saving to Excel and other formats, all rows are saved, not just the selected ones. Is there a method to filter the Gridview by dropdown selection and be able to save only selected rows?
I have a gridview that is bound to a dataset via dataview in a webform. I have added some controls alongwith logic in my webform for filtering the gridview at run time. I would like to pass this filtered gridview results to a Microsoft reportviewer so that my boss could print the report. What would be the best way to accomplish this? I would like to have gridview on one page and report viewer on another page. But I don't know how to refer to that gridview from another page.
In my scenerio, i've a dropdownlistbox by which i want to filter, a textbox for the text to filter and two textbox for specifying from and to date.
A gridview control for displaying the filtered data and a sqldatasource control and a commandbutton called search.
The following code is used to filter the data in database and it works properly. But when i click on edit in gridview, the gridview displays no records and again when i click on search button the data is displayed on the gridview displayed with the selected row in editmode.
I'm new to Linq. I have searched and searched the web for a soluion, and can't find anything. I have a Linq query and I want to insert a row ("Select User") to the top before I pass it to the drop down list. I've been trying to use the Union but to now avail (it keeps telling me that my object doesn't support the Union method). My code, prior to attempting to inser a row, is very simple.
public SelectList DropDown_Users() { var context = new VivarianDataContext(); var query = from t in context.AspnetUsers select new { t.UserId, t.LastName }; list = new SelectList(query.AsEnumerable(), "UserId", "LastName"); return list; }
Now I try to insert a row and I found this on the internet and it seems to say that his solution will work. But it is filled with syntax errors. [URL]
I tried to implement it using the following code, but it doesn't compile.
public SelectList DropDown_Users() { SelectList list; //get the original data var context = new SQL2005633131VivarianDataContext(); var query = from t in context.AspnetUsers select new { t.UserId, t.LastName }; //create a dummy table with an empty row var AllUsers = new List<AspnetUsers>(); var BlankUser = new AspnetUsers() {UserId=System.Guid.Empty, LastName="Select One"}; AllUsers.Add(BlankUser); //use Union to join the data - ERRORS HERE var newTable = AllUsers.Union(query); list = new SelectList(newTable.AsEnumerable(), "UserId", "LastName"); return list; }
in my asp.net+access web code in vb. There is three labels named (tata.text,tvs.text,msu.text) is there any option on clicking on the label named tata.text the data pertaining to tata be displayed in a gridview in another page or a popup display in same page.
I've currently got a form with two dropdown boxes on, and an XML file sitting on the site.
My two drop down boxes are Location and Date and what i'm trying to do it get the Location box to filter the XML and put the dates in the Date dropdown box.
There is a session on a web form that holds the holidays of a year.I just intend to remove any repetitive days.... but couldn't get index of item in list.
Protected Sub PersianDateCalendar1_ValueChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles PersianDateCalendar1.ValueChanged
