ASP.NET

Problem with iframe control

12-May-08 0:06

Are both forms visible at once ? If so, then if they are not parent and child, I doubt you can do that, without polling using AJAX. If only one is visible at a time then the form will work out the new state for itself as it reloads.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Vsree11-May-08 23:29

Vsree

11-May-08 23:29

Hi
In my webform(webform1.aspx), i have an iFrame control, along with with many web controls.
The "src" attribute of it refers to another webform.(webform2.aspx)

I want text to appear in the frame on clicking a button which fetches the
value from db. Am using a session variable to hold the text to be assigned for iframe.

And am using the following code in WebForm1.aspx

<br />
private void Button1_Click(object sender, System.EventArgs e)<br />
{<br />
 Session["Cont"]		=	"This is a page";<br />
 <br />
HtmlGenericControl	frame1	=	(HtmlGenericControl)this.FindControl("txtFrame");<br />
<br />
 frame1.Attributes["src"]	=	"WebForm2.aspx";		<br />
<br />
 Server.Execute("WebForm2.aspx");<br />
 Response.ClearContent();<br />
}<br />

And in WebForm2.aspx,Page_Load(..)

<br />
if(Session["Cont"]!=null)<br />
{<br />
	Literal1.Text	=	Session["Cont"].ToString();<br />
}<br />

The problem is when i click the button in WebForm1.aspx, along with actual text, a textbox with some characters is appearing in the iFrame though there's no other control in the target(Webform2.aspx) other than Literal control. Frown | :(

Please help me in finding out the actual problem and its solution.
Thanks

~VSree

Object reference not set to an instance of an object

Saba0211-May-08 23:24

Saba02

11-May-08 23:24

Hi,

I have this code for my e-Commerce site (asp.net2 with C#) for adding items to Shopping Cart:

protected void btnAddToCart_Click(object sender, ImageClickEventArgs e)
{
string Price = double.Parse(((Label)DataList1.Controls[0].FindControl("PriceLabel")).Text).ToString("0.00");
string ProductName = ((Label)DataList1.Controls[0].FindControl("BookNameLabel")).Text;
string PictureURL = ((Label)DataList1.Controls[0].FindControl("picLabel")).Text;
int ProductID = Convert.ToInt32(Request.QueryString["idLabel"]);
if (Profile.cart == null)
{
Profile.cart = new ShopCart.myshoppingcart();
}
Profile.cart.Insert(ProductID,Convert.ToDouble(Price),1,ProductName,PictureURL);
Server.Transfer("ItemIndex.aspx");
}

but when i'm runnig my site and click on btnAddToCart
this error occur:
Object reference not set to an instance of an object.
i underlined my code where this error occur.

i search in google but i didn't get any result or i don't underestand what should i do?

how i can solve this error?

thank you,

Hoda

Re: Object reference not set to an instance of an object

Christian Graus11-May-08 23:27

Re: Object reference not set to an instance of an object

11-May-08 23:27

Saba02 wrote:
string Price = double.Parse(((Label)DataList1.Controls[0].FindControl("PriceLabel")).Text).ToString("0.00");

Wow - what horrible code.

Try this:

if (DataList1.Controls.Length > 0)
{
Control c = DataList1.Controls[0];
Label l = c.FindControl("PriceLabel") as Label;
if (l != null)
{
string Price = l.Text;

Apart from the layers of code with no error checking, what on earth possesses you to do a double.Parse, then turn it back to a string ? If you want to make sure the value is a double, use double.TryParse, not a method that, if it fails, throws an exception.

eyeseetee11-May-08 23:28

eyeseetee

11-May-08 23:28

This is quite a general error message.
You will need to check that all code referenced in the c# is correct at time of processing:
i.e. dont refer to a control in c# which doesnt exist in aspx page
For example you could be finding a control that doesnt exist or

Saba02 wrote:
QueryString["idLabel"]);

the above might not exist or be transferring

Can you post your aspx?

Remove additional rows from data table.

rahul.net1111-May-08 22:48

11-May-08 22:48

Hello all,
In a data table in am getting number of rows present is dataset returned by query.If my datatable contain 15 rows the i want to remove last 5 rows.I need only 10 rows in datatable and bind that rows to datalist.
So how can i remove additional rows (more than 10) from data table.

<br />
QuestionCount =0<br />
 QuestionCount = QuestionCount + questionDs.Tables(0)<br />

Please help me.

People Laugh on me Because i am Different but i Laugh on them
Because they all are same.

Christian Graus11-May-08 23:13

11-May-08 23:13

The most logical way to do this, is to do it in the data layer.

rahul.net1111-May-08 23:32

11-May-08 23:32

Can u tell me how can i do this using data layer?

People Laugh on me Because i am Different but i Laugh on them
Because they all are same.

Christian Graus11-May-08 23:45

11-May-08 23:45

By only requesting the rows you want to display, for example, select top 10 * from blah

rahul.net1112-May-08 0:02

12-May-08 0:02

I cant use select top 10 because of my requirment.
Because i am retrieving question accordingly to element id. If element 1 contain 15 question then i want to display only 10 question on a page. If it contain 5 question then i am retrieving question using next element id. If element 2 contain 10 question then i need to display 5 remenign question
from first element and 5 question from element 2 on next page.Next 5 question from element 2 need to bind to seprate data list.
I need to bind question from each element to seprate data list.

People Laugh on me Because i am Different but i Laugh on them
Because they all are same.

Eytukan11-May-08 23:19

Eytukan

11-May-08 23:19

Why not use a filter in the datatable ? like "Select top 10 .." Or you may even consider using it in the actualy SQL query that you use to retrieve rows from DB.

OK,. what country just started work for the day ? The ASP.NET forum is flooded with retarded questions. -Christian Graus

Best wishes to Rexx[^]

rahul.net1111-May-08 23:29

11-May-08 23:29

How can u use filter to data table? I cant use top 10 query because accordingly to requirment i am getting question for each element. If first element contain 2 rows or rows less than 10 then i am binding that to datalist if it contain less than 10 and element 2 conatin 15 rows i want to display remening rows in next datailst. (if element1 conatin 3 rows then
i want to bind only remening 7 rows to second data list.I want to display only 10 record on a page)
So i am checking the condition if element 1 contain rows lessthan equal toor greater than 10.

Please tell me how can i do this.

People Laugh on me Because i am Different but i Laugh on them
Because they all are same.

Christian Graus11-May-08 23:58

11-May-08 23:58

Why do you need all the questions if you're not going to show them all ?

Sounds like you need to set up paging in your data layer.

rahul.net1112-May-08 0:06

12-May-08 0:06

I cant use paging because on each page once all questioin get displayed i need to display "Finish" button on last page. When he click on Finish then he can see all the summery of his survey and if he wish then before submitting survey he can change his answer by usnig previous link by which in on last page.

People Laugh on me Because i am Different but i Laugh on them
Because they all are same.

Christian Graus12-May-08 0:07

12-May-08 0:07

Perhaps you need only one datagrid then, to show all the questions ? Why do you have two ? Are they on different pages ?

I think you need to keep your previous answers in the session, or in viewstate, as you keep going back to the same page but showing a different page of questions.

rahul.net1112-May-08 0:21

12-May-08 0:21

I need two data grid because i want to show element name before displaying question in that element. In following fashion.

Element 1
- Question 1
- Question 2
- Question 3
- Question 4
Element 2
- Question 1
- Question 2
- Question 3

in that fashion. At the end of page <next> Link. On next page next question in the same element or any other element. In that ways. Admin can add any number of element in a selected category and any number of question in selected element. When user taken any survey he must see all the question followed by element name before displaying question in that element.

People Laugh on me Because i am Different but i Laugh on them
Because they all are same.

Christian Graus12-May-08 11:58

12-May-08 11:58

I would render the list of questions with nested repeaters. And, like I said, I would use the same page over and over to render questions and then use viewstate to store all the answers given so far.

using google search

eyeseetee11-May-08 22:00

eyeseetee

11-May-08 22:00

Hi
I am using google search box on my intranet which is in an internal network.
I cannot seem to get it to work though is this because google search only works on a website and not an internal intranet.

any help would be great

thanks!

Re: using google search

Christian Graus11-May-08 22:10

11-May-08 22:10

Google does not index your internal site, so why would it be able to search it ? If you don't expose it to the web, then google is not indexing it, simple as that.

Re: using google search

Jeremy Falcon11-May-08 22:24

Jeremy Falcon

11-May-08 22:24

Christian Graus wrote:
Google does not index your internal site

Well, you can buy a Google server to do this, but I don't think that's what Capt. OP had in mind.

Jeremy Falcon
Oatmeal Engine[^]

Re: using google search

Christian Graus11-May-08 22:37