I have a gridview and for each row, I have updated a specific column's value.
However, I need to do this on pageindexchangedevent and I have wired up the code for this, but it does event does not break (I have a breakpoint)?
What is the best way to change a gridview's values when the page has been changed?
You can do your code on the grid view row data bound.
Related
I have an asp.net gridview with several rows/pages.
There are some fields below it which display full details of the row which has been clicked on gridview.
I then change a field value on the details below area and the new data is saved programmatically to database.
However the value on the gridview just changed below, doesn't change.
I would like to just change de cell value on the gridview programmatically so there is no need to reload the data grid.
I am basically looking for something like:
GridView1Row.row(currentrow).column(5)="xxxx"
I've search around and found some solutions based on _onrowdatabound but this is not correct, as I just want to change one cell of the grid.
Any ideas ?
The easiest way would be to change the value in your datasource and then binding the datasource to the grid again. (don't reload it from the database just change the value in the datasource)
I want to do something really simple, I just can't seem to find the EnableClientAddRow property, so I can set it to true. I have a standard GridView control on a web form. I want a button to appear on the web form. When the user clicks the button, an empty row is added to the GridView UI, so the user can enter data in the appropriate fields. The row will of course, have a "Save" button of some type in one of the columns.
I know this functionality must be in the GridView somewhere, I just can't find it. I did find some odd hacks that try to manually implement this. I'm not really interested in footer manipulations or binding tricks, just the standard add row method.
EDIT:
It appears the GridView does not support adding a row as a first-order operation. This appears to be a serious design flaw.
I typically add a new record to the underlying data source as a part of the "add record" button click action. I then re-bind the view in order to show the blank row.
The new record is typically a DataRow if the GridView is bound to a DataTable, or an object if the GridView is bound to a collection of a particular type. Not sure if that is what you consider a binding trick from your question, but it works well and is quite easy to implement.
Edit - more detail to describe the process:
Add the row to the data source, set the EditItemIndex to the newly added row in order for the row to enter edit mode, then bind the data source to the GridView. Your EditItemTemplate would contain a Cancel and a Save button. Cancel would re-bind the GridView to the underlying data source without the empty row and set EditItemIndex to -1, thereby removing the row from the GridView.
How to easily insert row in GridView with SqlDataSource
If you add a new row to the datasource, even if the row has empty values, and you databind the datasource to the Gridview, it should show up as an editable row just like any of the other rows.
I have a gridview in ASP.nET and I have a "Select" command field. What I want to do is that when the user click on on the "select", I would like to take the selected row and do some calculations and rebind the original gridview with updated the row.
How can do this?
Thanks.
// do your thingy
DataGridViewName.DataBind();
There are a lot of places where grabbing the row is already explained. Take a look at this Link. You have to call the bind data method on the grid after your calculations. If you want to modify just that row, I would think you modify the source data collection for that row and rebind.
This link may also help. Instead of Edit, you could have Select.
Ok, i have a gridview and on page load, i dynamically add a column to it that contains a link control. this link control has a onclick event associated with it so that when its clicked, i want to do some processing. Now I have noticed that if I just bind the grid the first time (i.e. if(!IsPostBack) and have enableviewstate for the grid to be true, clicking the link in that column, doesnt trigger the onclick event. But if I bind the grid on every postback, everything seems to be working..does anyone know the reasoning behind it?
It happens because you're dynamically adding the column, so on every postback the column has to be created. What you may want to do is to look at Creating a Custom Column.
May be creating the row Id solves your problem. Check out this link and the post marked as answer.
http://forums.asp.net/p/1471128/3408069.aspx#3408069
Regards
Vinay
I have created a GridView whose columns are dynamically created based on my data source. I have implemented these columns by using the approach described here.Those columns display properly on the initial load. However, I need to implement commanding so that a user can edit / delete a row in the GridView.
At this point, I have implemented commanding as I would with a normal GridView. I have a TemplateField with an ItemTemplate that has LinkButton elements for edit and delete. The CommandName for each LinkButton is set to either Edit or Delete respectively.
Oddly, when a user clicks either the Edit or Delete link, the data in the GridView disappears. However, I have verified that I am in fact re-binding the data when one of these LinkButton elements is selected.
Can anyone provide some suggestions as to what the cause could be?
Thank you!
Here are good examples. You can figure out postback issue.
http://quickstarts.asp.net/QuickStartV20/aspnet/