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 get a message - "Function without an 'As' clause" for HMAC_MD5 and "Variable declaration without an 'As' clause" for Key and Value. But the code works. But the messages still exists. Is there a way to fix this to avoid the messages?
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I have a really simple web interface which has been created in visual studio 2010 and is connected to an SQL server running MS SQL Server 2008. I essentially want the user to be able to enter values into the two text boxes provided and when the button is clicked, these values are inserted into the relevant table in the database.
When I run the code, I get an error back saying that the 'scalar variable for @clientName is not defined.' I have altered the insert statement to fixed values rather than entering from the text boxes and this works fine (ie, replace @clientName and @serverName in the insert statement with 'xx' and 'yy' respectively). How I can define these scalar variables. I'm not to sure what i'm missing. Code below.
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
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The code that the button executes is below
Partial Class Default2
Inherits System.Web.UI.Page
Protected Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
SqlDataSource1.Insert()
End Sub
End Class
I have this
var result = general.GetInformation(int.Parse(ID), F_account, F_Info, Types);
this GetInformation is my Entity.Getinformation class.. when I am trying to assign result globly I am getting Cannot Assign to implicit typed local variable?
var result = ?
what should I assign in global?
I want to declare a Dictionary<string, object> variable but don't know where/how to. The values in the dictionary will be objects from the Page (ListBoxes, DropDownLists, etc) so I can't exactly create a class somewhere else. Is there any way I can make this variable accessible from each method in the codebehind?
View 5 RepliesI have a user control in which I have declared a connection string as a private class variable.
I have a bunch of cascading dropdown lists in this control.
In one of my subroutines PopulateDdlPostalCodes I get an error "Connection was not initialized".
In all the other subs that use Conn, the class variable is being recognized.
If I duplicate the declaration of Conn in this sub then all works ok.
Why is this sub different than all the others?
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I have this procedure
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I don't know what variable should be put in where clause for tblVisitor.visitorID because there's a variable that was already passed by an output identity parameter by a different stored procedure. What will I put in the where clause for visitor id?
Consider this code:
Partial Public Class MyAspNETClass
Inherits System.Web.UI.Page
Protected Shared MyVariable As String
Is Myvariable a variable used local for each instance of the page ? Or that variable is "shared" for all users accessing my page? Is MyVariable saved in server memory, or is it saved on the viewstate of aspx page?
I am looking for differences between those 3 ways of using static class in asp.net application scope.
Will all of these point to the same class?
Which one is preferable >object< defined declaratively inside global.asax or static class ?
examples:
<object runat="server" scope="application" class="classname" ID="objID"></object>
VS
public static class classname {}
VS
Application("a") = new classname();
i want to declare variable for whole of my project , i mean for solution, where and how should i do it?
View 16 RepliesI 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() ?
View 1 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
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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,
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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.
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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
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I 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)"
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I'm getting "Must declare the scalar variable "@ShowTypes"." when I try to run the code below.
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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 Replies