Calling Variable In Different Subs?
Sep 21, 2010
How do i call a variable in different subs on the page? I know I need to create a Private_Sub....? But I don't know the how to complete it. For example, I have the following code in a Button Click event. But I also need xamount in a different Button Click for the same page. Like I said, I believe I need something like a Private_Sub or Protecetd_Sub (not sure which one and why) with a made up name to reference it....like Private_Sub subXAmount, but I don't know how to complete it and then reference it.
[Code]....
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Aug 31, 2010
I hope this is simple but I can't find any information when searching Google about passing a variable between two Protected Subs.
When I use the fileUpload tool within my webform I need to take the filename chosen and use it in a different Protected Sub
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May 9, 2010
I'd like to know how to declare a variable in my code behind page that I can use in all the subs of my code behind.
I tried in after the Partial Class declaration to declare a "Public String" :
[Code]....
and to use it in my subs but when I use it from a sub to another I loose the value affected in another sub.
Is there a way to use a Public variable from a sub to another (I'm actually using a session variable in order to do it and I'm not sure it is the best way)
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Feb 8, 2011
I've done a search and read a few things, All i'm trying to do is set a variable in the code file and call it in the page file asp.net vb.net 3.5. I've tried like this in the code file:
[Code]....
And in the design part of the page:
[Code]....
But it says that name isn't declaired. What am I doing wrong?
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May 20, 2010
Can I code to add transaction for some subs? If there is an error in any sub will roll back.For example, sub1 delete some tablessub2 insert data into tables which just be deletedsub3 send out confirmation emailsub4 make submit button disable
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Aug 6, 2010
the best place to store Subroutines and Functions for global access for a beginning programmer:
-As a .dll file (class library) in the bin folder?
-As seperate classes under the App_code directory?
-or just all together in the code behind on a blank page?
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Jun 22, 2010
If I do thisPublic PageDetail As CoreBO.GetStartUpDetails = PageCoreBLL.InitialSetup(DomainName)
[Code]....
Where GetStartUpDetails is a structure in the Business Objects Layer In my page subs is their a performance differance between writing
sub xx
Dim test as pagedetails.structure1
response.write (test)
end sub
or just response.write (pagedetails.structure1)
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Dec 9, 2010
can we grab a global variable or Session or View State variable in the javascript or using jquery?
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May 17, 2010
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.
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Oct 7, 2010
I got a variable of type System.Drawing.Image and need to convert it to a variable of type byte so I can store the image in the database. Can someone show me how to do that in VB.NET code.
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Jul 14, 2010
I'm evaluating two options of accessing a server side data on client side. Little bit confused about the efficiency or may be you can call it as finding best approach to do it.
I need to access a server side data may be an integer value in javascript on client side. I know about two options to do it.Create a public variable or property on server side and set it to javascript variable on client side as below:
var value = eval(<% =value %>);
Create a asp hidden variable and set value in this hidden variable from server side and access it through javascript using document.getElementById().
Which is the best approach and what are the pros and cons?
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Sep 7, 2010
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).
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Jul 16, 2010
I'm am not quite sure why I am getting this error.
Dim numUsers as Integer
Using myConnection as New System.Data.SqlClient.SqlConnection("Data Source=(local);InitialCatalog=dbtest;Integrated Security=True")
Dim queryString As String = "SELECT COUNT(*) AS Num_Of_User FROM tblusers WHERE username=@username AND password=@password"
Using myCommand as New System.Data.SqlClient.SqlCommand(queryString, myConnection)
myConnection.Open
myCommand.Parameters.AddWithValue("@username", requestName)
myCommand.Parameters.AddWithValue("@password", requestPass)
numUsers = myCommand.ExecuteScalar()
End Using
End Using
This error occurs on the first using statment.
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May 14, 2010
have a look at this simple code snippet
[Code]....
Here second declaration of x gives error that "variable 'x' hides a variable in an enclosing block. I wonder why this error is not given for second 'i' variable declared in second for loop?
Since i am declaring second x in a separate for block, why this error is given for variable second x ?
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Dec 2, 2010
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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Aug 24, 2010
Which is better from a performance perspective?
Accessing a Global Application Variable (Application["foo"])
versus
Accessing an AppSetting variable from the web.config
Does .NET Cache the AppSetting variables so that it is not accessing the web.config file with every use?
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May 25, 2010
I have the dataset. in this i am having total 20 tables with huge amount of data..I want use this data over all the page..so where i can keep this data..
before i used viewstate but the viewstate data is render to page every postback ..so this time the page size is increasing(interanlly viewstate is rendered to page)..so performence wise it was very slow..
Now i change my logic insted of viewstate to i used Globel Dataset on Page Level.. now the performence wise better than viewstate..
i used Like shared dsControls as Dataset at top of the page..so every time i use this dataset..
my quesation is session is better or Globel variable is better way use in my situavation..
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Mar 7, 2010
[Code]....
The variable is assigned a value in another class like this:
[Code]....
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Jan 3, 2011
I've a question I don't know if this is possible or not. I've tried a lot of things till now but could not accomplish on what I wanted to do.
What I want to do is call a web page from another page and some how execute either the page load event or page init event and get the result of the page in the first page.
Page A calls page B. Page B has static text and a label which is being set in page load event.
Page B - Code behind
[Code]....
Page B -- HTML code
[Code]....
Till now what I've tried is using the code below from page A. But this code just returns the Html code and nothing else.
[Code]....
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Oct 20, 2010
Nested GridView Control returns "Object variable or With block variable not set" when outer GridView returns rows.
The Nested GridView Control works as long as the outer GridView returns rows, the following code works: [Code]....
Object variable or With block variable not set.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object variable or With block variable not set.
Source Error:
Line 118: If e.Row.RowType = DataControlRowType.DataRow Then
Line 119: Dim myStatus_ID As SqlDataSource = CType(e.Row.FindControl("sqlDeviceStatusAssign"), SqlDataSource)
Line 120: If Not e.Row.DataItem("Status_ID") Is Nothing Then
Line 121: myStatus_ID.SelectParameters(0).DefaultValue = e.Row.DataItem("Status_ID")
Line 122: End If
I have tried checking for IsDbNull and checking to see if a label exists in a given row. This code *If Not e.Row.DataItem("Status_ID") Is Nothing Then* appears to do nothing.Same with the following:
*Dim localLblItemReference As Label = CType(e.Row.FindControl("lblItemReference"), Label)
*If Not localLblItemReference Is Nothing Then
******************************************************************************************
To further clarify my question above, I am looking for a method to detect e.Row.DataItem("Status_ID") is nothing/null due to the outer GridView returning 0 results in a query.I have a (Outer) GridView Control with another GridView Control inside of a template field with it's associated SqlDataSource control.
In the "Protected Sub GridViewReport_RowCreated", I provide the Select Parameter for the associated SqlDataSource with the DataItem row value.When the (Outer) GridView Control does not return any rows, the "e.Row.DataItem("Status_ID")" throws a:
Exception Details: System.NullReferenceException: Object variable or With block variable not set.
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Jan 3, 2011
I am using three listviews on a page ... the first is always populated ... the other two are sometimes populated I want to total amounts and counts from all three ... so I set up steps in the DataBound events works great when all three listviews are populated the error "Object Variable or With block variable not set." occurs when LV2 or LV3 is not populated I've tried testing DataItem ... Is Nothing but get the failure on the If test instead
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Oct 25, 2010
I have 2 separate code-block asp.Net expressions in an aspx markup, with an html content between (span element in the example below). In the first code-block, there is "i" as an increment variable for the for loop.Then the code-block is cut with an html content.And another code-block expression is opened but as I see I can reach the "i" variable which was declared in the previous code-block.
So, how asp.net handles -compiles- the pieces of code-block experrions declared in the mark up? Does it check the semi-colons and generates some anonymous methods which will end up with many calls to Response.Write in the last place?
<p>
<%for (int i = 0; i < 30; i++)
{
[code]....
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Mar 7, 2011
I am having one doubt regarding the use of static variable in Asp.net pages.I am having one page say UserDetails.aspx.In this page, I have one static variable to store some data specific to a user. So, will this ?
public partial class UserDetails
{
static int numberOfReviews=0;
[code]...
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Nov 22, 2010
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.
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Mar 28, 2011
I am newbie in asp.net.I want to ask about calling dll in asp.net.For your info,I already add references into that dll and register dll using command : regsvr32 c:filename.dll.
My problems is,how to call this dll when user clicks on submit button?How can i implement this in asp.net?
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