Hi there, I have problem with accessing value in TextBox. Here is my 

source code: 



<asp:DataGrid id="EditNewsGird" AutoGenerateColumns="False" 

ShowFooter="False" ShowHeader="False" CellPadding="0" CellSpacing="0" 

Runat="server" GridLines="None">

<Columns>

<asp:TemplateColumn>

<ItemStyle VerticalAlign="Top"></ItemStyle>

<ItemTemplate>



<asp:TextBox ID="ActNewsBox" Runat="server" Height="75px"></asp:TextBox>



<asp:Button ID="odoslat" Runat="server" Text="Save" 

OnClick="odoslatBtn_Clik"></asp:Button>			



</ItemTemplate>

</asp:TemplateColumn>

</Columns>

</asp:DataGrid>



CodeBehind: 



protected DataGrid EditNewsGird;

protected TextBox  ActNewsBox;

protected Button   Odoslat;



private void Page_Load(object sender, System.EventArgs e) {

string         id       = Request.QueryString["id"];

SqlConnection  Spojenie = new SqlConnection

("Server=localhost;Database=gamesland;uid=sa;pwd=sa");

FillNews(sender, e, Spojenie); // -- runnig some function

if (id != null) {

   EditNews(sender, e, Spojenie, id); // -- runnig some function



}

}



public void odoslatBtn_Clik(object sender, System.EventArgs e) {

			if (Page.IsValid) {

				string someString = ActNewsBox.Text;

				Response.Write("UPDATE");

//Here I want to acces the value of TextBox ... but i received this one:

//NullReferenceException: Object reference not set to an instance of an 

//object

//TextBox value come from MSSQL db ... i want submit and access the value 

			}

		}

ok ... i know the problem now ... so the answer is ... how can i access 

server control which is nested under server control? ... TextBox is nested 

in DataGrid ...

I have a similiar problem - and could not realy find a good solution, but

came up with a terrible hack.



IF ANYONE HAS A BETTER SOLUTION I AM INTERESTED ALSO!



1) I changed my template column to work like below



<ASP:TEMPLATE COLUMN >

    <ITEMTEMPLATE>

        <%# DO_TEXT(DATABINDER.EVAL(CONTAINER.DATAITEM, "SHOWNUM") %>

    <ITEMTEMPLATE>



2) I wrote a procedure called do_text



Public Function do_text(ByVal TextName As String, ByVal DefaultValue As

String, ByVal FieldWidth As Integer) As String



' this function is a wrapper because the html page can not seem to call



' the function directly when it is in an external module



' i wish this was different but can not find any other solution...



' (at least i used a wrapper for this terrible hack......)



Dim num As String



num = Trim(Session(TextName))



Session(TextName) = Session(TextName) + 1



TextName = Trim(TextName) & Trim(num)



do_text = Html_Text(TextName, DefaultValue, FieldWidth)



End Function



this returns a string like - <input type="text" name=requestname0">



3) To access the value use response.redirect("requestname0")





I know that this is a terrible approach - but it is the best that I could

do - and it allowed me to

use a datagrid to input all of the fields - hope it helps







----- Original Message -----

From: <vop@i...>

To: "Website Programming with ASP.NET"

<aspdotnet_website_programming@p...>

Sent: Monday, March 11, 2002 2:50 PM

Subject: [aspdotnet_website_programming] Re: Problem: Object reference not

set to an instance of an object





> ok ... i know the problem now ... so the answer is ... how can i access

> server control which is nested under server control? ... TextBox is nested

> in DataGrid ...




$subst('Email.Unsub').

thanx ...

but ... this is something like drilling teeth through ******* :))) ... but 

my "solutions" were also something like it ... i try to solve it through 

client-side javascript (textboxes where in DataGrid but i had some input 

boxes out of datagrid and through javascript i took the value of textboxes 

and filled it into input boxes ) ...



i hope that someone has better solution ...

Datagrid are excellent for the display of data!

but the stink when it comes to ANYTHING else.





Sometime when I have nothing to do and would enjoy pounding my head on the

wall

I will try doing a custom control based upon the asp:textbox tags......





----- Original Message -----

From: <vop@i...>

To: "Website Programming with ASP.NET"

<aspdotnet_website_programming@p...>

Sent: Tuesday, March 12, 2002 4:43 PM

Subject: [aspdotnet_website_programming] Re: Problem: Object reference not

set to an instance of an object





> thanx ...

> but ... this is something like drilling teeth through ******* :))) ... but

> my "solutions" were also something like it ... i try to solve it through

> client-side javascript (textboxes where in DataGrid but i had some input

> boxes out of datagrid and through javascript i took the value of textboxes

> and filled it into input boxes ) ...

>

> i hope that someone has better solution ...




$subst('Email.Unsub').

I found the solution ... but with it comes other problem ... the 

solution's name is Editable DataGrid ... but ... TextBox value come form 

DataSet and after Submit the value didn't change ... Example:

TextBox value form DB: "AAAAA"

I wrote: "AAAABBBB"

Value after submit: "AAAAA" -> the same like before submit

Just to let you know guys, you can access datagrid items (like your 
textboxes) this way:
 
yourdatadrig.Items(<zéro-based line index number>).Controls(<find the text 
box index control or use FindControl>)
 
then use 
CType ( <this this up here...>, TextBox).Text and you go it... ;)
 
 
M&M's are better than Money because you can eat them! : o

l8r
Ryders

THANK YOU FOR THE INFO!

I have been looking for a way to do this for some time, but do not fully
understand.
Could you send me an example?

-----Original Message-----
From: Sebastian [mailto:ryders2005@m...]
Sent: Tuesday, March 19, 2002 1:49 PM
To: Website Programming with ASP.NET
Subject: [aspdotnet_website_programming] Re: Problem: Object reference
not set to an instance of an object


Just to let you know guys, you can access datagrid items (like your
textboxes) this way:

yourdatadrig.Items(<zéro-based line index number>).Controls(<find the text
box index control or use FindControl>)

then use
CType ( <this this up here...>, TextBox).Text and you go it... ;)


M&M's are better than Money because you can eat them! : o

l8r
Ryders

Try this one:
protected DataGrid EditCompany;
public void WriteFirma_Click(object sender, System.EventArgs e) {
 string  IDFirma   = Request.QueryString["id"];

 Control cFirmaBox = EditCompany.Items[0].FindControl("FirmaBox");
 string  TextFirma = ((TextBox) cFirmaBox).Text;

 Control cFirmaTyp = EditCompany.Items[0].FindControl("TypList");
 string  FirmaTyp  = ((DropDownList) cFirmaTyp).SelectedItem.Value;

 Control cLinkBox  = EditCompany.Items[0].FindControl("LinkBox");
 string  LinkFirma = ((TextBox) cLinkBox).Text;
}