VB.Net adding a new row to a db from a datagrid

Forums › IT Pro and developers › VB.Net adding a new row to a db from a datagrid

8d52797c436

264 posts

Ultimate Geek
Inactive user

#49541 19-Nov-2009 15:42

Hi Everyone,

I am creating a datagrid and I need the ability to add new rows to the database from this datagrid. I have placed textboxes in the footer of the datagrid and used an ItemCommand event handler so that when a linkbutton is clicked my function is called. Everything is going well except the text in the textboxes is not being passed properly to the function.

I am using the following command to extract the text.

sqlcmd.Parameters.Add("@GoodsDesc", SqlDbType.VarChar).Value = CType(e.Item.FindControl("txtGoodsDesc"), TextBox).Text

I'm sure this is right but I have a feeling the text is not being bound to the box or something as it is just giving me an empty string. Is there a step I am missing out here where I tell the code to set the text from the textboxes?

nate

6473 posts

Uber Geek

Retired Mod

Trusted

Lifetime subscriber

#274576 19-Nov-2009 20:03

What's happening in Page_load? Are you escaping that sub before your new line is initiated?

BenRees

27 posts

Geek

#274729 20-Nov-2009 13:10

Hi there

Have you tried accessing the text box directly?

sqlcmd.Parameters.Add("@GoodsDesc", SqlDbType.VarChar).Value = Me.txtGoodsDesc.Text

This assumes the textbox's RunAtServer property is set to True.

Cheers

pwaddles

113 posts

Master Geek

#274798 20-Nov-2009 18:34

Hi, I use datagrids a lot in my development to display info, but I never wanted to use them for adding whole rows, instead I just setup some textboxes and combo boxes for the fields that I know are going to be there and then have a submit button, I find this makes it a little bit easier for the user to input data.

Hadley

8d52797c436

264 posts

Ultimate Geek
Inactive user

#275386 23-Nov-2009 10:14

nate: What's happening in Page_load? Are you escaping that sub before your new line is initiated?

Thanks for the hint. It seems that when I click on the link to call the method it is going straight to page_load before it calls the function. This is causing it to clear the text boxes before it tries to read the text in them. Now it's just a matter of figuring out how to stop this. I have a few ideas so here's hoping it works.

BenRees

27 posts

Geek

#275398 23-Nov-2009 10:39

Page.Load will be called for every post back. But by the time it is called (there is some code that runs prior to this) your textbox should already have its value. The only time that this may not happen is when you are dynamically adding controls with code, instead of using Asp.Net designer or the Html window. Post your code if you get stuck and I'll have a look.
Good luck
Cheers
Ben

ReaperSA

3 posts

Wannabe Geek

#280224 8-Dec-2009 02:21

@OP:

Very important to remember not to re - bind data on page_load if a postback has occured you can use the following to assist you.

If page.isPostBack = false then
'Call your databinding here
end if

Hope this helps :)