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hi,
i'm facing a problem in retreiving files from server. i have posted some files in a folder in my web server. while running the program it will show all the filenames in a dropdown list. i want to open a file while selecting the file name. its working in localhost but its not working after hosting the page.
plz help me
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mukesh.mr03 wrote: its working in localhost but its not working after hosting the page.
Opening means just showing redirecting to the file and prompting for a download ? or opening the file using any file methods ? Can you post the code you used for this ?
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this is the code i'm using in it. i have to open the file in any way(download or open)
DirectoryInfo di = new DirectoryInfo(Server.MapPath("Data/"));
string pa = di.ToString();
if (di.Exists == false)
{
di.Create();
}
FileStream fs = new FileStream(di + "/" + DropDownList1.SelectedItem.Text, FileMode.Open);
fs.Seek(0, SeekOrigin.Begin);
fs.Close();
ProcessStartInfo psi = new ProcessStartInfo(di + "/" + DropDownList1.SelectedItem.Text);
Process.Start(psi);
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mukesh.mr03 wrote: ProcessStartInfo psi = new ProcessStartInfo(di + "/" + DropDownList1.SelectedItem.Text);
Process.Start(psi);
This looks fine in the case of desktop applications. But in ASP.NET , Process.Start() can't start a process in clients machine, because ASP.NET it works on server. You can redirect to the file instead, which forces browser to open a save dialog box, and user can download the file to his/her system. Use
Response.Redirect("Data/" + DropDownList1.SelectedItem.Text);
mukesh.mr03 wrote: DirectoryInfo di = new DirectoryInfo(Server.MapPath("Data/"));
string pa = di.ToString();
if (di.Exists == false)
Out of Topic : There is no need to use DirectoryInfo for checking directory existence. Directory class provides a static methods which checks directory existence.
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the path you are giving must be of local file system.Try to download the file at client side and then open it.
Shujaat
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this is the code i'm using in it.
DirectoryInfo di = new DirectoryInfo(Server.MapPath("Data/"));
string pa = di.ToString();
if (di.Exists == false)
{
di.Create();
}
FileStream fs = new FileStream(di + "/" + DropDownList1.SelectedItem.Text, FileMode.Open);
fs.Seek(0, SeekOrigin.Begin);
fs.Close();
ProcessStartInfo psi = new ProcessStartInfo(di + "/" + DropDownList1.SelectedItem.Text);
Process.Start(psi);
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Hello frnd
I declared one variable(like dim num as integer=0),if i click the button1 i want to assign 1(num=1) if i click button2 i want to assign 2(num=2),but every time if i click the button the value is assigned properly but immedialy leaving that function again that variable value is zero,how to solve this problem?
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Probably you are declaring the variable inside the functions. If you do that, a local variable is created which hides the member variable. The only code you want in the function is num = 4. If you have dim num as integer in the method, that's your problem.
Christian Graus - Microsoft MVP - C++
"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 )
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hi frnd
i didn't declare the variable inside function,i declared that variable ,variable declaration part.
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use static variable for that 
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Just to be clear, that does not solve the problem, but if the problem was the value being different between class instances, this would be the solution.
Christian Graus - Microsoft MVP - C++
"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 )
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I declared the static variable in declaration part like " static num as int16=10" but is showing error,if i declare that variable inside function means that not showing error.how i want to declare static variable in declaration part.
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ps.srinivasan wrote: declaration part.
What is this declaration part ? A static variable in VB.NET can be declared like
Static Myvar As Integer = 1 I don't think that declaring variable into static won't solve the problem. Where you declared the variable now ?
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N a v a n e e t h wrote: Static Myvar As Integer = 1
I declared the variable like that.
N a v a n e e t h wrote: I don't think that declaring variable into static won't solve the problem.
so how i want to solve that problem.my question is simple if i click different button i want to assign different value for variable. Where i want declare that variable?,how i want to declare that varible?
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ps.srinivasan wrote: Where i want declare that variable?,how i want to declare that varible?
You need to declare your variable inside the form.
Public Class Form1
Inherits System.Windows.Forms.Form
Dim Flag As Integer = 1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Flag = 1
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Flag = 2
End Sub
End Class
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N a v a n e e t h wrote: Public Class Form1
Inherits System.Windows.Forms.Form
sorry frnd my question for web from not window form
Public Class WebForm2
Inherits System.Web.UI.Page
Dim Myvar As Int16 = 0'this code is executing when ever i click the button.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Myvar = 1
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Myvar = 2
End Sub
End Class
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ps.srinivasan wrote: sorry frnd my question for web from not window form
Why don't you tell this before ?  As Guffa told, HTTP is stateless and it can't keep objects/values on postbacks. You can assign the value to a viewstate/cookies/session.
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Abhijit Jana wrote: use static variable for that
Static variables can't be used that way in a web application. Every user would share the same variable.
Unless you have data that should be shared between all users, static variables are useless in a web application.
Experience is the sum of all the mistakes you have done.
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Problem is CG said, adding to his post, you can declare the variable inside the class not inside the function. Variables declared inside the function will be having scope only in the function.
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Making the variable an instance member doesn't help a bit, as the instance of the Page class doesn't survive between postbacks.
Experience is the sum of all the mistakes you have done.
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Guffa wrote: Making the variable an instance member doesn't help a bit, as the instance of the Page class doesn't survive between postbacks.
Yes you are right. But he didn't explained that he is doing this in webforms. I thought it's in winforms.
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N a v a n e e t h wrote: But he didn't explained that he is doing this in webforms.
Well, he posted in the ASP.NET forum...
Experience is the sum of all the mistakes you have done.
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Guffa wrote: Well, he posted in the ASP.NET forum...
 Grin
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A page object only lives while the response is created on the server. Once the response has been created and sent to the browser, the page object goes away.
If you declare a variable in the page object, it will only live as long as the page object lives. Once the response is sent to the browser and the page object goes away, the variable doesn't exist any more.
When you press the button, a new request is sent to the server, a new page object is created to handle the request, and the new page object contains a new instance of the variable that is assigned the initial value of zero.
Web pages are stateless. If you want to keep a value between requests, you have to either send the value back and forth between the server and the browser (using a cookie, viewstate or a hidden field), or assign it to a session variable.
Experience is the sum of all the mistakes you have done.
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