I heard that Global.asax file is optional in asp.net web application. But, if we need to declare any session variables in my website, do i really need to add Global.asax file and initialize session variables inside Session_Start() ?
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Possible Duplicate: Use of var keyword in C# Hi, I am pretty new in C#,I would like to know the best practices in declaring variables.I know it is possible to use VAR (explicit declaration) or the DataType when declaring a variable (implicit).
View 3 Repliesi want to declare variable for whole of my project , i mean for solution, where and how should i do it?
View 16 RepliesIf ((intCustomerCount Mod intColumns = 0) And (intCustomerCount > intColumns)) Or (intCustomerCount = intColumns) Then
View 3 RepliesI have an ENUM shown below that I would like to be able to use on multiple aspx pages. I would like to put it in a class (.vb) file in App_Code
I was not sure of how to declare it in the class file and then how to refer to it on the aspx pages.
Public Enum Slots
NotDefined = 0
Host = 1
Admin = 2
Seller1 = 3
Seller2 = 4
SellersAgent = 5
SellersAtty = 6
End Enum
Here are 3 scenarios:
namespace NS
{
public partial class A: System.Web.UI.UserControl
private Variable v;
protected void Page_Load(object sender, EventArgs e){
if (!Page.IsPostBack) v= new Variable();
....
}
}
namespace NS
{
public partial class A: System.Web.UI.UserControl
private Variable v = new Variable();
protected void Page_Load(object sender, EventArgs e){
}
}
namespace NS
{
public partial class A: System.Web.UI.UserControl
private Variable v;
protected void Page_Load(object sender, EventArgs e){
v = new Variable();
}
}
When does the variable "v" gets created every time for the 2nd scenario? Is the 2st scenario is equivalent to the 3rd one?
I've began working with asp.net mvc very recently and I've ran into a problem.I've got an aspx page which renders a few ascx pages. What I'd like to do is declare a global var at the aspx page so it is visible to all its childs. I tried <% var i = 0; %> but it wasn't visible at the child pages. What could I do?
View 4 Replieshow to Declare scalar variable
[Code]....
I Am getting error as Must declare the scalar variable "@Imageid" for the following code,while executing,
exec spGetPager  ' ' , ' ', ' 3 ', ' '
In my coding I pass querystring value like 1,2,3 etc
CREATE PROCEDURE spGetPager
@PageNo int = 1,
@ItemsPerPage int = 1,
@Imageid int,
[Code].....
I would like know how to declare a global variable that can be used within a user after the user login and before the user logout across all the possible pages.
I need to develop a web application that will connect to 5 different servers depends on the selection of user on what server they wish to connect and after they select a server and login...I will need to keep track the server name in a variable last until the user logout (user may visit various pages but the server name MUST NOT be changed due to other user login into different server). So how can I do it so that other users may select different servers and will keep the server name for each different users.
Let says:-
User A selects Server A and login and User B selects Server B and login at the same time, so how the global variable can handle the needs for each user (User A & B) with different server select?
Is "Session" the only way to fulfill the above? I think of using Application State but it seems that the value stored will be shared by all users and not for a particular user.
I am rather confused as how or where to declare this variable in asp.net.
[Code]....
Whenever i put this in my sqldatasource for it is asking me to Define Parameters:
The wizard has detected one or more parameters in your SELECT statement. For each parameter in the Select Statement, choose a source for the parameter's value.
How to declare a global variable or a public sub in a web application that all aspx pages can have access to?
View 5 RepliesI'm looking for a way to declare a global variable (so all pages could see) but personal (so if one user puts some value in it, it won't matter to another user or change his value).Sessions and hidden fields won't do. I've tried working with declaring keys in Web.config but unfortunely, the keys values aren't personal, and all users share the same key value.Another way I was thinking was maybe classes, but perhaps there might be an easier solution?
View 19 Replieswhen I am executing an above code and click on button to insert data is shows an error message
as:Â System.Data.SqlClient.SqlException: Must declare the scalar variable "@imagefile"
Protected Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button1.Click
Try
If fileupload1.HasFile Then
'getting length of uploaded file
[Code]....
Currently in an .aspx file, I am storing a value (filename that was created in that session) in an hidden text box. When the user clicks on the "Print" labeled Hyperlink control, it opens the file that was stored in the hidden text box control. But when the user goes to different screen (in the same session), I loose the filename value that is stored in the hidden text box control. So I would like to store the filename variable in a session variable. So that if the user leaves this .aspx file and comes back to this .aspx file I can load the value into the hidden text box from the session variable.
View 11 RepliesI can't figure out whats wrong with my contact page. I am getting this error when executing. It complied fine, I see the page as it suppose to. Then I enter all my contact information and click submit I am getting this error. Can someone guide me. Here is the error msg
must declare the scalar variable @txtSubject Here is the part of relevant code
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
Dim ContactDataSource As New SqlDataSource()
ContactDataSource.ConnectionString = ConfigurationManager.ConnectionStrings("ASPNETDBConnectionString1").ToString()
ContactDataSource.InsertCommandType = SqlDataSourceCommandType.Text
ContactDataSource.InsertCommand = "INSERT INTO Enquery (EnqSubject,EnqFirstname, EnqLastname,EnqContactNumber,EnqEmail,EnqMsg,EnqDateTimeStamp,EnqIPAddress) values (@txtSubject, @txtFirstname, @txtLastname,@txtPhone,@txtEmail,@txtMsg, @txtDateTimeStamp,@txtIpAddress)"
[Code]....
I'm getting "Must declare the scalar variable "@ShowTypes"." when I try to run the code below.
[Code]....
i want to declare a variable in page load{} as global so that i can monitor it so that it is not recreated each time
View 4 RepliesHow do I define @UserName in my function:
[Code]....
I believe "UserName" = Me.User.Identity.Name
but I don't know the proper way to add it to the function.
OK, this may be a little difficult to explain, so I will try my best and post the code I currently have.
I have a table with a list of usernames. I have the list of usernames displayed on a page through a GridView. What I am attempting to do is for each username in the column "adminUsernames", I need to insert a set of values in another database table for EACH "adminUsernames" that exists. Example: There are 2 adminUsernames vales in 2 seperate rows. These are "Admin 1" and "Admin 2". For each adminUsername values (Admin 1, Admin 2), I need a row interted in another database table. Maybe the code that I have (that does not work) will help you see what is happening:
[Code]....
I keep receiving this error when running: [Code]....
how to declare global variable in master page and use it in all pages
View 1 Repliesi would like to insert a picture on a gridview, but i allways get the error:
Must declare the scalar variable "@IMAGEM"
somme one can on tihs code ? here is my code:
[code]....
can we grab a global variable or Session or View State variable in the javascript or using jquery?
I have a web application which uses a session variable to store the logged in userid. If no user is logged in, of course this variable will be empty and the contents displayed on my website are meant for guests. If there is a user logged in, the user specific controls/access/links will then be a displayed.
I am now having issues with my hosting where on shared application pool, the worker recycle is triggered every 90 minutes, this will clear sessions causing all my users to be logged out. I opted for a dedicated application pool, which got worse because I am only allocated 50MB memory limit and if this is reached, the worker recycle is triggered and I lose my sessions again. I have tried as much as possible optimization techniques, e.g. dispose where possible, close connections, disable viewstate for static controls etc but my memory per instance keeps building up from page to page without any signs of improvement. I don't use loops nor store huge objects like bitmaps etc but my sessions are now gone even faster than 90 minutes in shared application pool before.
I have considered using SQL Session State but there isn't a simple guide on using this with MySQL. I am getting desperate and considering using a public variable, a string as a replacement to store logged in user id instead of in a session variable. I am pretty sure this will solve my issue with sessions being recycled but are there any negative consequences of doing this? One problem I can think of is if the user closes the browser, the system will never know that the user is now logged out and this public variable should be nothing. In this scenario, will the GC eventually clear this abandoned public variable.
What would be the proper syntax in ASP.NEt 3.5 C# to assign a TextBox value to a temporary or session variable to be manipulated (added, subtracted, multiplied, divided) at different points in the application? I want to add a decimal number to this variable in almost every instance as well.
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