Sorting Headers For Data Columns
Apr 12, 2010For the data obtained from data set, how to design Sorting headers for Data Columns in grid view in asp.net?
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CPW
EE
Foh
H3G
IND
O2
ORG
P4U
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i need to add a hyperlink to each gridview cell and when that cell is clicked pass the header text through the querystring to another page. I can access the cells value ok and pass that through but i cannot seem to access the cells column header text. when i response.write out a count of the gridview.columns it brings back 2 which is the template fields but not the dynamic fields i have tried this on the rowdatbound, rowcreated, page_load and page_unload. the count should be 12 its like it cannot find the dynamic columns at all. ?
here is my code for populating the gridview
[Code]....
and here is my gridview:
[Code]....
i am also moving the total column in this code
[Code]....
and calculating my total in this code and adding my link to the total colum (which works fine)
[Code]....
now i just need to somehow add a link to the other cells and somehow get the value of the header text for that cell clicked.
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Jul 22, 2010I've been asked to take over a project that's filled with a bunch of bugs. It's currently using MVC 1.0 and there's a view with Html Helper Data Grid that uses a DataGridHelper class. I'm not that familiar with all of MVC yet, and I was wondering if it is possible to have the sorting of the columns be a POST event rather than a GET.
Currently when a user clicks a column to sort, the controller for the view calls the GET action method. This I guess is all fine and good, but the problem is that this view has a search form (which is a model in it's own right) with some text boxes and some drop down lists. When the GET action method is called, I lose all of the information in the search criteria. So when ever someone searches for something, but then wants to sort the results, it requries the db for all records (because all of the search criteria is cleared).
I guess there could be two solutions:
1) Is there a way to access the items in the search form / model in the GET portion of the action method? I've tried using ViewData or adding a parameter for the search form model, but (and maybe I'm doing it wrong) both return null.
2) Is there a way to make the sorting event of a column call the POST portion of the action method? That way I'll have the search form / model information and be able to sort the search result content instead of query for all records.
Also, there is a stored procedure that currently can handel all of possible search parameters. So, no matter what sort column is selected, or search parameters are entered, it can properly setup the sql query.
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My datagrid is named dgFileList and the onsortcommand method is named dgFileList_SortCommand.
The procedure that is already loading on page load is a DataSet. (where I think my problem is)I dont have anything in the back end beside the dgFileList_Sortcommand method. From what I have read, it seems like I can't use a DataSet to be sorted...I'm using visual studios 2005, C#, not VB.
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CSS
div#div-datagrid {/*style="height: 382px; overflow: scroll; width: 100%"*/ width:100%; height:382px; overflow: scroll;/*scrollbar-base-color:#ffeaff;*/}/* Locks the left column */ td.locked, th.locked { position:relative; cursor:default; background-color:White;/*IE5+ only*/ left:expression(document.getElementById("div-datagrid").scrollLeft-2);}
[Code].....
ADO.NET :: Paging And Sorting Using Different Columns?
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The table has a ID field, a date field and a Serialnr field.
In my Grid I like to Page on the datefield but to sort on the serialnr field (or a selectable other field.)
Is that possible? Standard the paging is always done on the sort field and when you select a different sort field the page jumps back to the first page, and paging is then done over the sorted column.
Sorting A Gridview Alphabetically When Columns Are Codes?
Jun 15, 2010i have a gridview populated by a Web Service search function. some of the columns in the grid are templatefields, because the values coming back from the search (in a datatable) are ids - i then use these ids to lookup the values when the rowdatabound event is triggered and populate a label or some such.
this means that my sorting function for these id/lookup columns sorts by the ids rather than the textual value that i have looked up and actually populated the grid with (although i do put the ids in the grids datakeys).
what i want to do is top be able to sort by the looked up textual value rather than the codes for these particular columns.what i was going to do to get around this was to when the datatable comes back from the search, adding more columns the textual values and doing all the looking up then, thus being able to sort directly from the manually added columns.
is there another way to do this? as that approach seems like a bit of a bodge. although i guess it does remove having to do the looking up in the rowdatabound event....
my sorting function works by sticking the datatable in the session and on each bind grabbing the sort column and binding the gridview to a DataView with the sort attribute set to the column - and the direction.
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Sep 30, 2010is it possible to disable sorting on specific columns? 5 out of 7 columns have to be sortable, two not sortable. The columns are created dynamically in code behind, so I think doing this with mark up is out of the question. When I say disabled, I'm hoping that the underline wont show on the column header when you mouse over it.
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protected void grduAdminSerservice_Sorting(object sender, GridViewSortEventArgs e)
{
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[code]...
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Jul 18, 2010Moderators Note: THIS ISSUE IS BIG FOR ME AND EVEN IF POSSIBLE, GET THE REPLY FROM THE DESIGNER OF GRIDVIEW. I have been looking for him for long. I am really fed up with reviewing a good lot of web pages on how we can possibly customize the gridview to enable sorting and paging. So many sites have listed out a lot of information and so many guidances. But the problem is that one works out fine and the other is a burden. I really feel bad about being given the job of customizing this kind of a gridview which has no user friendly approach to it. Also, this control is rendered without the pager links inside the <tfoot> tag. I have tried the Pear Pager in php. It is that good and easy to use and compared to that, the gridview in asp.net is the worst ever control i have ever tried so far.
1. i can use the images to indicate the sorting direction
2. I can have the custom pager like
[code]
<<Previous 1 2 3 .. 7 Next >>.
[/code]
When i click the next when i am viewing the page at 3 , the pager links should change as
[code]
<<Previous 2 3 4 .. 7 Next >>
[/code]
Kindly look into this type of requirement and firstly tell me whether this is possible with the gridview control. I would like this request even to be escalated to the designers of the gridview control also, so that Microsoft comes out with a reply THAT WORKS and not the kind of stuff like surfing through a lot of links and pages and finally wasting a lot of days precious time and still breaking the head with this useless control. I have spent a lot of time in searching for a perfect way. Not writing a code that is non-standard. I am really serious b'cos I have spent weeks in customizing this control. If I dont get a solid reply atleast now, I am going to generate all the output by HTML content by custom coding.
C# - GridView - Columns.Insert() Cause Data To Vanish On Postback But Columns.Add() Works OK?
Oct 13, 2010I have a GridView that has several dynamic columns (I do not know how many at design time and it could be 0-12 columns, hence need for dynamic columns). I have the columns in the grid and data bound to them - works great. There are other standard, design-time TemplateField columns with TextBox controls in them. These are bound with values that the user can edit. The grid is posted back via a Submit button. My question is "Why does gv.Columns.Insert() cause all my TextBox data to be null on Postback, but gv.Columns.Add() works like a champ?"
protected void BuildColumns()
{
// The first column to begin to insert the columns in the GridView
int columnIndex = 5;
BoundField aoColumn = new BoundField();
aoColumn.HeaderText = "New Column 1";
gvMyGrid.Columns.Insert(columnIndex, aoColumn); // kills txtQuantity.Text on postback
gvMyGrid.Columns.Add(aoColumn); // works fine
columnIndex++;
foreach (MyEntity my in _myEntityCollection)
{
BoundField myColumn = new BoundField();
myColumn.HeaderText = String.Format("{0:d}", my.StartDate);
gvMyGrid.Columns.Insert(columnIndex, myColumn);
columnIndex++;
}
}
I then go on to assign values to these BoundFields in the _RowDataBound method and all of this works great. However, when I post back and try to reference some TextBox and they are all null. And yes, I have the BuildColumns() call wrapped in if (!IsPostBack) on Page_Load. Of course I would like to use .Insert() so that the columns can go in the proper location and not at the end of the Columns array.
Forms Data Controls :: Create An ASP Grid With Dynamic Columns With An Ability To Freeze Columns And Rows
Sep 20, 2010I created a gridview that is made up of 4 gridviews and using a stored procedure to populate it. I create columns at runtime because the number of columns changes all the time.To make the grids editable I am adding template fields at runtime as I create the columns, this is to ensure that a user is able to edit the cells and some foot values update. Reason why I have four grids is to freeze rows and columns like in excel using javascript. The problem is that performance is very bad especially in IE, the grids take a long time to load. I am not sure if this is caused by the data load or the creation of text boxes. see some of the code below for my _aspx page:
[Code]....
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