Hi JLeary,
By default, when a datagrid is in edit mode, the text of a bound column in
the edit line is changed into a Textbox automatically and the text's value
is put into the Textbox(not ViewStat). If the bound column is a hidden
column, the Textbox will not be rendered to client. So, value in the
TextBox is also lost. When the page postback, we can't get that value .
One resolution to deal with this is described in my prior post. It forces
the label control to be created in the cell. Although this column is
hidden, the value is stored in ViewStat. When it postback, it loads
ViewStat and puts this value back to datagrid. So we can get it in the code.
Another method to walk around this problem is getting the value from
dataset which is binding to the datagrid.
Best Regards,
Lewis
Get Secure! -
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http://www.microsoft.com/security>
This posting is provided "AS IS" with no warranties, and confers no rights.
--------------------
| From: "JLeary" <
[email protected]>
| References: <
[email protected]>
<
[email protected]>
<#
[email protected]>
<
[email protected]>
| Subject: Re: Getting the value of invisible columns/cells
| Date: Wed, 30 Jul 2003 14:40:25 -0400
| Lines: 113
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|
| Thanks Lewis...I had come across a similar posting last evening. This does
| work; however, I'm not sure why it is necessary. Your help is appreciated.
|
| | > In addition, after converting hidden columns to template columns, we
also
| > need to delete EditItemTemplate of thses template column; otherwise
there
| > will be a cast exception. We can do it like this: right click the
datagrid
| > and move to "Edit Template", then select one of hidden columns in the
pop
| > up menu, delete the textbox in the EditItemTemplate cell.
| >
| > Please let me know if it works. Thanks.
| >
| > Lewis
| >
| > --------------------
| > | Newsgroups: microsoft.public.dotnet.framework.aspnet.datagridcontrol
| > | From: (e-mail address removed) (Lewis Wang [MSFT])
| > | Organization: Microsoft
| > | Date: Wed, 30 Jul 2003 13:14:02 GMT
| > | Subject: RE: Getting the value of invisible columns/cells
| > | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.datagridcontrol
| > | MIME-Version: 1.0
| > | Content-Type: text/plain
| > | Content-Transfer-Encoding: 7bit
| > |
| > | Hi JLeary,
| > |
| > | Sorry that I misunderstood you in the prior post, I reproduced this
| > problem
| > | on my side, and we can use the following method to resolve this
problem.
| > |
| > | 1. Change all hidden columns to template columns. You can easily do
this
| > in
| > | the properties builder of the datagrid. Select the columns tab, click
| one
| > | hidden column in the "Select columns"listbox, and you will find a
| > "convert
| > | this column to a template column" link upon the "OK" button. Click the
| > link
| > | then click OK.
| > |
| > | 2. In the code behind, in Onupdate method, we can get the value of
| hidden
| > | columns on the edit row, something like this:
| > |
| > | Label label1=(Label)DataGrid1.Items[2].Cells[0].Controls[1];
| > | //DataGrid1.EditItemIndex=2;
| > | string s=label1.Text;
| > |
| > | Please note that we need to use "1" as the subscription in the
Controls
| > | collection (Controls[1]), because the label control is the second
| control
| > | of the cell.
| > |
| > | Hope this helps.
| > |
| > | Best Regards,
| > | Lewis
| > |
| > | Get Secure! -
www.microsoft.com/security
| > | This posting is provided "AS IS" with no warranties, and confers no
| > rights.
| > |
| > |
| > | --------------------
| > | | --------------------
| > | | | From: "JLeary" <
[email protected]>
| > | | | Subject: Getting the value of invisible columns/cells
| > | | | Date: Tue, 29 Jul 2003 12:05:55 -0400
| > | | | Lines: 14
| > | | | X-Priority: 3
| > | | | X-MSMail-Priority: Normal
| > | | | X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
| > | | | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
| > | | | Message-ID: <
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| > | | | Newsgroups:
microsoft.public.dotnet.framework.aspnet.datagridcontrol
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| > | 216.57.145.64
| > | | | Path:
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| > | | | X-Tomcat-NG:
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| > | | |
| > | | |
| > | | | Hi all,
| > | | |
| > | | | What is the best way to get the value of hidden columns in a
| > datagrid.
| > | | I've
| > | | | read a few articles, but the approaches don't seem very clear.
I've
| > | | | basically got a result set with an autoincrement key and two
foreign
| > | keys
| > | | | that are automatically populated when a row is added. I do not
want
| > to
| > | | show
| > | | | these columns in the datagrid. When I try to access the grid
values
| on
| > | | | update they return null for these columns, unless I make them
| visible.
| > | | |
| > | | | Thanks in advance for any suggestions!
| > | | |
| > | | |
| > | | |
| > | | |
| > | |
| > |
| >
|
|
|
