ASP.NET Discussion Boards

ships_agr30-Mar-10 18:15

30-Mar-10 18:15

i'm new to asp.net...i don know all its technicalities.....i want to create a seat chart of some auditorium using javascript and enable and disable some of its seats....also allow user to select some of the seats without page reload(only the color of those seats may get changed....and i may be able to collect their seat numbers)
if anyone can help me with this or can tell me some other way to create such a user interactive seat chart...???

Re: using javascript to create seat chart

sashidhar30-Mar-10 23:34

sashidhar

30-Mar-10 23:34

Its better to use update panel other than Java script for seat chart

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Re: using javascript to create seat chart [modified]

ships_agr31-Mar-10 3:48

ships_agr

31-Mar-10 3:48

hi....if you can please elaborate how can i use the update panel for the seat chart of a cinema hall as i'm not through with all the technicalities of asp.net....as i'm still studying it.

modified on Wednesday, March 31, 2010 12:27 PM

Re: using javascript to create seat chart

sashidhar31-Mar-10 19:39

sashidhar

31-Mar-10 19:39

First how You are trying to display the number of seats. are you trying to use the buttons or any control.
I suggest you the update panel because it will not refresh the whole page .

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Re: using javascript to create seat chart

ships_agr1-Apr-10 3:32

ships_agr

1-Apr-10 3:32

hi all....

i'm using html input button for this purpose....but i'm unable to retrieve the values in .cs file....what i want is to display arrangement of around 100 seats in a theatre...and would like user to select some seats whose color will change on clicking without reloading the page.....and in .cs file i may be able to retrieve the seat numbers...???
same seat chart as you would find one while booking tickets for a movie online....they ask you select seats of your choice....i wanna do the same thing....can anyone help me???

Re: using javascript to create seat chart(i tried nd presenting the code here)

ships_agr1-Apr-10 5:21

ships_agr

1-Apr-10 5:21

hi sashidhar.....

i tried to use the update panel.....i took an update panel.....and 5 buttons....took a session variable and incremented it on click event of each button.....it all worked but the problem now is if i refresh the page the value of session variable is not refreshed....counting starts from the last where the page was refreshed....i'm providing you the code....Have a look....!!!
The default.aspx File:
<body>
<form id="form1" runat="server">
<div>

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<br />
<asp:Button ID="Button6" runat="server" onclick="Button6_Click" Text="cancel" />
<br />
<br />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<br />
<br />
<br />
<asp:Label ID="Label1" runat="server" Text="Panel Created"></asp:Label>
<br />
<br />
<br />
<asp:Button ID="Button1" runat="server" BackColor="Aqua"
onclick="Button1_Click" Text="Button" />
<br />
<br />
<asp:Button ID="Button2" runat="server" BackColor="Aqua"
onclick="Button2_Click" Text="Button" />
<br />
<br />
<asp:Button ID="Button3" runat="server" BackColor="Aqua"
onclick="Button3_Click" Text="Button" />
<br />
<br />
<asp:Button ID="Button4" runat="server" BackColor="Aqua"
onclick="Button4_Click" Text="Button" />
<br />
<br />
<asp:Button ID="Button5" runat="server" BackColor="Aqua"
onclick="Button5_Click" Text="Button" />
</ContentTemplate>
</asp:UpdatePanel>

</div>
</form>
</body>

now the Default.aspx.cs File:
The code was given on click event of all buttons taken in update panel:

int i = Convert.ToInt32(Session["i"]);
i++;
Session["i"] = i.ToString();
Button3.BackColor = System.Drawing.Color.Red;
Label1.Text = "Refreshed at " + DateTime.Now.ToString();
Button3.Enabled = false;

Re: using javascript to create seat chart(i tried nd presenting the code here)

ships_agr1-Apr-10 5:26

ships_agr

1-Apr-10 5:26

please tell me how can i refresh the value of session variable on page refresh

Reg IIS

sowjanya330-Mar-10 17:48

sowjanya3

30-Mar-10 17:48

Will there be any problem for image to display in runtime? If IIS is not installed in our system?

Every time in run time the image in not viewable but while at design time it is viewable.

Re: Reg IIS

Arindam Tewary30-Mar-10 19:31

Arindam Tewary

30-Mar-10 19:31

1. Displaying images does not depens upon IIS. If you dont have IIS then you can not host an .NET web application.
2. It seems that you can run the application and in runtime you can not see images. FYI, you mention images path in controls of your application and at runtime, the images path should match to the actual physical location images.

if you dont see images, rather you get to see 'image' control but a 'cross' showing images not displayed, right click on images to get to see what path the control is expecting at runtime. Depending upon that you should modify the image path in design view.

Please let me know if you get it going.

Thanks,
Arindam D Tewary

Re: Reg IIS

sowjanya331-Mar-10 23:37

sowjanya3

31-Mar-10 23:37

In each system it wil be prefixed with Local host number. the same code is working in other system. then what would be the problem? On ur suggestion i had right clicked on the image this was the link http://localhost:49216/ws/App_Data/pics/pic1.jpg in this except local host and its number my path is same

asp:TableCell ID="TableCell4" ColumnSpan ="2" VerticalAlign = "Top" HorizontalAlign ="Center" runat ="server">
<asp:image id="Image1" runat="server" imageurl="../../../../../App_Data/pics/pic1.jpg">

Re: Reg IIS

sowjanya330-Mar-10 21:27

sowjanya3

30-Mar-10 21:27

thanks fr d info will try it out and let you no

dialog box on if condition

ships_agr30-Mar-10 9:23

ships_agr

30-Mar-10 9:23

i want to compare the value of two text boxes and on true/false condition i want to display the message in a dialog box.....can any one help me with the coding in javascript????

Re: dialog box on if condition

Not Active30-Mar-10 9:50

Not Active

30-Mar-10 9:50

if(document.GetElementById("txt1").value == document.GetElementById("txt1").value)
{
 alert("Some message");
}
else
{
 alert("Some message");
}

What's so difficult?

I know the language. I've read a book. - _Madmatt

Re: dialog box on if condition

T M Gray30-Mar-10 10:09

T M Gray

30-Mar-10 10:09

Mark Nischalke wrote:
What's so difficult?

Using the correct operator? Smile | :)

Re: dialog box on if condition

Not Active30-Mar-10 10:27

Not Active

30-Mar-10 10:27

Guess the syntax validator addin stopped working. Blush | :O

I know the language. I've read a book. - _Madmatt

Re: dialog box on if condition

ships_agr30-Mar-10 18:08

ships_agr

30-Mar-10 18:08

thanks a lot.

A problem with Textbox and the property .SelectedText

_ASPAle_30-Mar-10 9:15

_ASPAle_

30-Mar-10 9:15

Hi I've a problem with the property .SelectedText.

I've Microsoft Visual Web Developer Express 2008 - Framework version: 3.5.

The problem is that Visual Studio can not find this property, I also checked that there were any dll.

Property. SelectedText is in the System.Windows.Controls namespace right?
I don't know where wrong, please help me!
Here is the msdn page from which I copied the code:
http://msdn.microsoft.com/en-us/library/system.windows.controls.textbox.selectedtext.aspx

Re: A problem with Textbox and the property .SelectedText

Gregory Gadow30-Mar-10 9:28

Gregory Gadow

30-Mar-10 9:28

It would seem that you are confusing two entirely different things. If you are developing for the web, the TextBox you are probably using comes from the namespace System.Web.UI.WebControls. That control does not have a SelectedText property. You should confirm that you are linking in the correct namespace.

Re: A problem with Textbox and the property .SelectedText

_ASPAle_30-Mar-10 12:02

_ASPAle_

30-Mar-10 12:02

I understand, but how do I catch the selected text from an asp:textbox and put it in a string variable?

But on that msdn page I linked, it seems that talk of a web application ... is not very clear!

Thanks for the help!

Re: A problem with Textbox and the property .SelectedText

Gregory Gadow30-Mar-10 18:22

Gregory Gadow

30-Mar-10 18:22

Notice the namespace referenced at the top of the article you linked: System.Windows.Controls. That means it is written using Windows Presentation Foundation (WPF), not ASP.Net. In web browsers, WPF is implemented through Microsoft Starlight, which is basically a subset of WPF merged with AJAX. This lets you preserve user states, such as what the user has selected in a text box. Normal ASP is built on the HTML protocol which is stateless: postbacks are handled by sending a hidden form, which gives the information (text in a textbox) but no metadata (what part of that text is selected.) That is why the standard ASP controls do not have properties like SelectedText.

I don't think you can do what you want to do using ASP. WPF and Silverlight has a lot of very interesting and useful functionality, but there is a bit of a learning curve. You could try posting your question in the Web Development or Silverlight forums, but it might be better to either figure out a different way to get what you want, or buckle down and learn a new programming tool. Unfortunately, I've not had the time to learn it myself, so I'll just shut up now. Wink | ;)

Re: A problem with Textbox and the property .SelectedText

Venkatesh Mookkan31-Mar-10 1:36

Venkatesh Mookkan

31-Mar-10 1:36

You can do that using JavaScript. As far as I know, you cannot do this from CodeBehind.

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Populate A Label in Listview From VB Event

MarkPhD30-Mar-10 7:52

MarkPhD

30-Mar-10 7:52

In my Listview InsertItemTemplate I have the following Label:

<asp:label id="IDNOInsertLabel" runat="server">I use the following VB statement (which works on a Formview) to popuate said Label:

CType(lvPTRPhoneCalls.FindControl("IDNOInsertLabel"), Label).Text = lblSelectedIDNO.Text

It gets an "Oject reference not set to an instance of an object" error.

How/when/where can I popuate a Label in a Listview using VB?

Thank you.

Re: Populate A Label in Listview From VB Event

Gregory Gadow30-Mar-10 8:04

Gregory Gadow

30-Mar-10 8:04

I'm not sure where the problem might be, but you can rewrite this a bit to help with the debugging.

VB.NET

Dim Obj As Object = lvPTRPhoneCalls.FindControl("IDNOInsertLabel")
If Obj IsNot Nothing Then
    Dim Lbl As Label = TryCast(Obj, Label)
    If Lbl IsNot Nothing Then
        Lbl.Text = lblSelectedIDNO.Text
    Else
        'Do something to report the error
    End If
Else
    'Do something to report the error
End If

With this, you can see if the control is not being found, or if it is found but is not a label.

Problem with Web Service

Sider8930-Mar-10 6:20

Sider89

30-Mar-10 6:20

When I'm executing project in this function this exception rises

private void callbackDoSomeWorkA(IAsyncResult ar) {
            string retval = sa.EndDoSomeWorkA(ar);// <-- here
            Stack stack = Session["Status"] as Stack;
            stack.Push(retval);
        }

WebException was unhandled by user code - The server committed a protocol violation. Section=ResponseStatusLine

what's the problem? Does enybody know it? Frown | :(

C# Developer

modified on Tuesday, March 30, 2010 2:08 PM

Re: Problem with GridView [modified]

Sandeep Mewara30-Mar-10 6:59

Sandeep Mewara

30-Mar-10 6:59

Google gave me this explaination for the error:
the problem is actually caused by the critical http header parsing/validating
of the HttpWebRequest component. According to the Http
Specification(http1.1), the HTTP header keys shoud specifically not include
any spaces in their names. However, some web servers do not fully respect
standards they're meant to. Applications running on the Dotnet framework
and making heavy use of http requests usually use the httpWebRequest class,
which encapsulates everything a web oriented developer could dream of. With
all the recently issues related to security, the "httpWebRequest" class
provides a self protection mechanism preventing it to accept HTTP answers
which not fully qualify to the specifications.

The common case is having a space in the "content-length" header key. The
server actually returns a "content length" key, which, assuming no spaces
are allowed, is considered as an attack vector (HTTP response split
attack), thus, triggering a "HTTP protocol violation error" exception.

Setting this would help:

<configuration>
  <system.net>
   <settings>
      <httpWebRequest useUnsafeHeaderParsing="true" />
   </settings>
  </system.net>
</configuration>

Detailed link by Microsoft support[^]

UPDATE: Also look at this link... this too involves above config but states some changes in Port!
http://channel9.msdn.com/forums/TechOff/257803-HttpWebRequestResponse-The-server-committed-a-protocol-violation-SectionResponseStatusLine/[^]

modified on Tuesday, March 30, 2010 1:10 PM

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