I need to create gridviews dynamically, of particular design(only 4 columns), first column has a checkbox, and the rest are boundfields, how can i create this, and bind the dynamically created gridview, is it possible to bind checkbox also(i have a bool column for this).
Later i need to check and uncheck rows, and on button click will i be able to access this dynamically created gridview to find checked and unchecked rows.
EDIT:
i have a data set with many(unknown no of) datatables having 4 columns,i need to Provide a UI for the user to change Data with in this DS.
Related
I have a aspx page consisting of a calendar button and a textbox.When we click calendar button then a calendar appears and the date which i select on calendar appears in textbox. Now what i want is to load the data from database according to the date selected and allow the user to edit it.And also i want to enable user to add rows at runtime. Do i need to create grid view at runtime?? Can somebody point me in a direction??
You don't need to create the gridview at runtime. You can define the gridview in the markup without having any data initially. You can set the calendar to autopostback and on the server side, capture the new date selected, grab the data based on that date and bind it to your gridview.
As far as editing the data, Gridviews already provide support for this and the amount of code that you need to write largely depends on how the datasource for the gridview is set up. If you use a SQLdatasource with the appropriate settings you practically don't have to write a single line of code besides the markup (Google: Gridview SQLdatasurce editing ASP.net).
I have a gridview which is being populated by a Javascript. Now after this action I want to add Start and Stop buttons to the data that has already being bound via the Javascript. So the final Gridview row would consist of 2 buttons and the column values that have been set by the Javascript.Can someone please suggest
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 datagrid which shows the search reasult(time entered by the user preveiously)on a button click event depending uppon the input name or date enter by the user,i want to show a drop down list for a field selection like depertment whenever user want to edit the data in datagridiew,i am using access database & asp3.5.
You can use the Template Columns to specify a dropdown list for when you edit a datagrid. You can also do a bit more on the code side if you want to do things dynamically, but the Template Columns will allow you to override the standard textbox that shows when you edit.
I have a database with 2 records Id and Description.
What I want to do is try to bind this to a table so for example
<tr>
<drop down select list with ids available> <textbox>
</tr> <add button>
So the user can select an id from the drop down list, enter a description then click an add button next to this which will duplicate that block dynamically so they can enter as many as they like. What is the best way to go about this in webforms? Detailsview? I'm not sure how to make it dynamically add html blocks though? Any help would be appreciated.
pseudocode :
foreach description
create new tablerow
create a table cell in the row with the description as a label
create a table cell in the row with the id dropdown as a combobox
add the tablerow to the table.rows collection
the tricky part is accessing the data in your dynamically created table, but it shouldn't be hard to do as long as you set an identifier on each control that can be tied back to your data.
I'd stay away from any of the built in controls (i.e. DetailsView, FormView) for anything other than simple CRUD forms, as it's not much more effort to manually create your own data-entry forms.
Dynamically adding controls to an ASP.NET Webform (and have them work across postbacks) is quite a tricky one to get right, but in short you'll need to do something like:
Add a table server control which will store your dynamic rows.
Create a property (stored in ViewState or ControlState) to store a count of rows available.
Handle the appropriate 'add' button click event, to increment the count property and add a new table row, and child controls.
Inside an OnInit event, create the number of table rows stored in the count property.
Dynamically created controls aren't persisted across postbacks, so you'll need to create them on every postback during the pages OnInit method. As long as the controls are recreated in the right order and with the same ID's, then they will be repopulated successfully on postback.
Because you're dynamically adding controls, you may need to set the pages EnableEventValidation property to false.