Forms Data Controls :: Cannot Access GridView.HeaderRow
Sep 17, 2010
I've searched for this problem on Google and also on this forum (and also this forum using Google) so if there is another topic dealing with this I apologize but I couldn't find it! :)
My problem is that when I try to access the HeaderRow property ASP freaks out and gives me the infamous 'Object variable or With block variable not set.'
error. Here is the code in question:
Public Sub gvwResults_DataBound(sender As Object, e As EventArgs) Handles gvwResults.DataBound
gvwResults.HeaderRow.Cells(7).Visible = False
For Each gvr As GridViewRow In sender.Rows
gvr.Cells(7).Visible = False
Next
End Sub
The line 'gvwResults.HeaderRow.Cells(7).Visible = False' is what raises the error. When I remove it, the code works just like expected except that the header row of the 8th column isn't invisible like I'd like it to be.
I'm pulling my hair out here, this is the very last thing that needs to be finished before this app is usable haha. :)
I have a Gridview with AutoGenerateColumns= true and AllowSorting=trueBelow is the code snippet I have in RowEditing. This works fine if I dont change the column order in future.Is there a way I can access the headertext and do something like this
If headertext="Start_StateID" Then dim Start_StateID As Integer = TheRowinEditMode.cells(this headercolumns index).text end if
I've read a few articles on this, but I keep doing something wrong, and I'm not sure what. I took out all of my customization and just want to add a single header row to the very top of my GridView... Can someone show me how I'm screwing up? This is the code I'm trying to use...
[Code]....
I have tried a few different ways of referring to the GridView table... e.row.parent, gv1.controls[0], etc, but nothing seems to work.
I don't get any errors, just nothing ever shows up when the GridView is rendered. I can't find the code using Firebug to look at the HTML either... what am I doing wrong?
(have also tried using "0" for the rowIndex when creating the new GridViewRow)
How to get HeaderRow text when sorting is enabled? (Columns are AutoGenerated and the column that I'm trying to access is set to invisible in the RowCreated Event.)
I have a dropdownlist outside the gridview control. My griview control also have dropdownlist in the first column. I want to populate the dropdownlist inside the gridview control for all rows when the selected item is changed in the outside dropdownlist.
I have a nested gridview which has been working fine. Now I need to turn the inner gridview off based on some condition: a IF block is added to the existing RowDataBound event of the outer gridview. Now I'm getting "the Object reference not set to an instance of an object" error. What should be the proper way to go about this? The code:
[code]....
In addition, is there a way to "switch" columns of the inner gridview? For example, column 1 is "City", column 2 is "Price". If user selects to sort by "Price", I woud like column 1 be "Price" and column 2 be "City". Is this has to be done programmatically or if there's other way?
This is my code and i am only able to edit the one data under the category school.But what i nd is to edit the other categories like the name,email...etc..how do i modify my code in the update command.Another thing is to delete the data how do i do that?
I have the code below. If there exists gridview within gridview, how can I access hdnOrderLineID from gvwComponent_RowDataBound in inner gridview RowDataBound event. What should be the syntax???
I have created a gridview at runtime. See code snippet. My problem is when I hit edit on the gridview, and check the ManuallyResolved checkbox in the 2nd column, and hit update, it won't update. I'm not sure how to get the update to work with the dynamic checkboxfield. I just don't know what the code is and in what procedure to put it in.
I'm attempting to create a mailto in a gridView as follows:Code Behind (Page_Load)
[Code]....
ASPX Page
[Code]....
The hyperlink field will not grab the mailString variable. It's blank whether I use my constructed string or just the basic "TEST" string. What am I doing wrong?
i m using Gridview which contents images.Every time user uploads images that images are get inserted into gridview .That is on button click event i m binding grid. But by doing so , every time when user clicks button page is get refreshed. So to avoid this i used WebMethod in which i m trying to bind gridview , but as Webmethod is always static i m not able to access gridview. So my Question is can we access Gridview inside static web method.If No Why?
I have two databases (DB1 & DB2) from which i wish to build a single table/gridview output, ideally i want to be able to sort the table by using any data.
However i cannot seem to figure out how to have more than one datasource per Gridview, and if i have more than one Gridviews then i can't sort all the data by any of the columns.
This is a oneway street, i do not want to update the databases from the webfront end.
I have a "simple" gridview that has some columns, and the ability for editing/deleting. I recently found that I can change the editing textbox to a dropdownlist and have follow that, using:
[Code]....
It's quite simple and instead of using an sqldatasource, I have successfully implemented using the sqlclient in the codebehind to bind data only when I want (since this GridView is for "reports" and is queried by many parameters from user inputs).From what I've found online, the only way people have populated the dropdownlist is by using an sqldatasource - is there any way to populate it using the codebehind sqlclient like I have for binding the gridview and other dropdowns on the page that are exactly the same actually. I'd obviously have to set the SelectedValue to be what the value is coming from the database, which I can't see being that difficult.
The tough part seems to be knowing when to access this "MoneyTypeEdit" dropdownlist. I thought it would be in the RowEditing event, so I tried something like:
[Code]....
And I know everything outside of the "inserted code" works, because it was fine before I added that, but the dropdown obviously didn't have any values. And I know the code inside the "inserted code" works because I use it somewhere else on my page to populate a similar dropdown. But I get the error that MoneyTypeEdit is null, and I'm guessing it's because it can't find the "MoneyTypeEdit" dropdownlist.
i am doing a gridview which consists of 1 checkbox,1 linkbutton, 1 textbox and 1 image button. For all the cell which has the checkbox checked, i need to collect the data and update the database.
Form the gridview, i need to collect few information before i update the database. That is the cell informaion (checkbox and textbox), and also the Line information, shift (Grave/Morning) and also the date.
I am having problem in reading out the date of each cell belong to. By using the code GridView.HeaderRow.Cell(n). text , i only able to access shift information.
The Date Information is done by adding additional header row and its coding is as below:
I have seen a lot of things on the net on this but nothing seems to work. I have a GridView with name and other information on files stored in a database but also on a Server. I display the gridview with the files and the user selects the file to delete (row) by hitting the command field for Delete. I have an event on the gridview for code behind. Here I want to access the file name for the row selected, to be able to include it in the File.Delete statement.
Even before this I want to display the selected file name in a label back to the web page. I have tried everything including findcontrol selectedValue, etc. Nothing is working. I either get complier error, or nothing is displayed in label. If I let it go the the File.Delete step I get access error becasue there is no file name. HELP. here is screen shot of the gridview. Ignore the download button for now. That is my next headache to figure out. So based on the screen shot I want the value of log_doc from the gridview. It is in a column called file_name
File ID File Name Log Upload Date Uploaded By Download Delete 3
I have a GridView inside a repeater, and for all the GridView events such as ItemDataBound, etc. I can't just use the same because it doesn't recognize it. I know I have to use FindControl and type in the ID, but how?
In the gridview I have a column called "% of Points" and another column called "total of pot". Outside of the gridview I have a label called (label Total) and it has a total amount of £6335.
The idea is that as each gridview row is created, it will check the amount in the label and based on the % amount in the % of points, it will work out the total of the pot (£6335) each row has. So for example, paul would have £1583.75 in his total of pot (25% of £6335 = £1583.75)
Anyone know how I should go about doing this? I presume I'd need to do a find control for the label, but not sure where to go from there.
