Length Of Variable Name?
Mar 12, 2010Does length of Variable really matter..?Are there any performance or any bad effects with long variable names..???
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Allow Users To Enter A Variable Length List Of Items In Form?
Jun 15, 2010I need to let my users enter a variable length list of items into something that looks like a grid view (or a series of standard text boxes stacked vertically). Each item could be a few characters or a few hundred characters long, and I just want them to enter a "sentence", and then tab to the next row, and always having another blank one ready to go at the bottom of the list.
I don't want to save any data to my SQL Server DB until they enter the entire list and then click on a "save all" button. When they hit the "save all" button they will be given a preview screen where the data will be presented as standard HTML ordered list. If they confirm/save, then each row of the grid will then be saved as a separate row into my SQL Server database (with an index to remember the order).What ASP.Net (or Jquery/javascript) UI control would be the best to use in this situation? (i.e. just for the data entry part - the rest I got covered).
Size For Variable Length Data Type Derived From Parameter Value?
Apr 21, 2010I have a few applications/websites running with LINQ to SQL and the other day I decided to go ahead and optimize some of the queries, etc and I found that the size for variable length data types is derived from the parameter value instead of the column actual size? for example a column is defined as nvarchar(30). when I use linq to query that column with a value that's 5 characters long the parameter in sp_executesql will be defined as nvarchar(5)...this causes a major procedure cache bloat even for a small utility site that has a lot of queries is there a way to optimize this?
View 1 RepliesErrorArgument Not Specified For Parameter 'Length' Of 'Public Function Right(str As String, Length As Integer) As String'?
Dec 14, 2010I have a datagrid and I set up the paging based on how many rows there are like this
With dgBookings
.AllowPaging = True
.PagerStyle.Mode = PagerMode.NumericPages
.PagerStyle.PageButtonCount = 5
.PageSize = 5
End With
Is there a way to set the horizontal-align in the code too I tried adding this
.PagerStyle.HorizontalAlign = Right
and I get this errorArgument not specified for parameter 'Length' of 'Public Function Right(str As String, Length As Integer) As String'.
JQuery :: Grab A Global Variable Or Session Or View State Variable In The Javascript?
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State Management :: Public Variable Vs Session Variable To Store Logged In UserID
May 17, 2010I 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.
Web Forms :: Convert System.Drawing.Image Variable To Byte Variable?
Oct 7, 2010I 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.
View 2 RepliesC# - Hidden Variable Vs Server Variable Accessing On Client Side In Javascript
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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?
Declare Variable In C# / Use VAR (explicit Declaration) Or The DataType When Declaring A Variable (implicit)?
Sep 7, 2010Possible 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 RepliesBC3016: Variable 'myConnection' Hides A Variable In An Enclosing Block?
Jul 16, 2010I'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.
Variable Hides A Variable In An Enclosing Block Error
May 14, 2010have 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 ?
C# - Temporary Or Session Variable - Want To Add A Decimal Number To This Variable
Dec 2, 2010What 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.
View 3 RepliesApplication Variable Versus Web.Config Variable
Aug 24, 2010Which 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?
Which Is The Best Usage Session Variable Or Global Variable
May 25, 2010I 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..
Public Variable C# - Variable Is Assigned A Value In Another Class?
Mar 7, 2010[Code]....
The variable is assigned a value in another class like this:
[Code]....
Forms Data Controls :: Nested GridView Control Returns "Object Variable Or With Block Variable Not Set" ?
Oct 20, 2010Nested 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.
Forms Data Controls :: DataBound Event - Error "Object Variable Or With Block Variable Not Set" Occurs When LV2 Or LV3 Is Not Populated
Jan 3, 2011I 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
View 3 RepliesResponse.Redirect Max URL Length?
Apr 23, 2010I'm looking at creating a simple URL shortening service for our corporate intranet, and I'm curious if anyone knows if there's a maximum length for URLs returned by ASP.NET's Response.Redirect method?
View 3 RepliesC# - Check If Two Strings Are Of The Same Length?
Jan 12, 2010I want to check if two string are of the same length. I tried the following, but it doesn't work.
string passnew = "1233";
string passcnfrm = "1234";
if((passnew.Length&&passcnfrm.Length)>6 ||(passnew.Length&&passcnfrm.Length)<15)
{
// ...
}
Why does it not work? What do I need to change?
C# - Max Length Validation Check?
Nov 25, 2010In my table in the DB, I have these data types for some of its columns..
Address1 nvarchar(200)
Address2 nvarchar(200)
City nvarchar(200)
State nvarchar(200)
Now in my aspx page I need to display this data in text boxes. What should be the max length for the text boxes for Address1 text box, Address2 textbox, City's text box and state's according to what I have in my DB ?
How do I apply the max length validation check on these text boxes in my page ?
Using Substring - Length Cannot Be Less Than Zero Error?
Dec 6, 2010I am trying to use substring in c# code.
This is the code i have used:
[Code].... I am getting the error as: "Length cannot be less than zero.
Parameter name: length"} System.Exception {System.ArgumentOutOfRangeException".
I want to get the result 123421, that is after the "\".
CSS / Javascript And Images Have Zero Length?
Feb 21, 2010I'm trying to port an ASP.NET MVC 1.0 / Visual Studio 2008 project to ASP.NET MVC RC 2 / Visual Studio 2010. The project is (and has always been) running on IIS 7.
Dynamic content (everything that's being delivered by controllers) works fine, but static content such as CSS / Javascript / Images gives me a "200 OK" response, a Content-Length of 0 and no content. It's as if all those files were entirely empty (I made sure the files are not empty though).
The static content is in a directory that I excluded from ASP.NET routing via IgnoreRoute.
It can't be a hidden 404 error since adding some garbage characters to the URL produces a reguar 404 error.
It doesn't seem to be related to filesystem permissions since I've already given everyone full access rights in the contents directory.
Edit: I just created a completely new ASP.NET MVC website from scratch and tried running that in IIS. It has exactly the same problem! So it's not really a problem of converting my project to MVC2 at all, it rather seems to be IIS that's causing the trouble. But what could possibly be the problem?
Dynamically Increase The Length Of The Url ?
Jul 23, 2010How to dynamically increse the lentgh of the url ?
let me more descriptive. I want to use it in asp.net version 2.0 and 3.5. The maximum length of the url in (IE 7 +) is 2048.
Various size support in different browsers (http://www.boutell.com/newfaq/misc/urllength.html )
IE 7 + - 2048
Firefox - 65000
Safari - 80000
Opera - 190000
.net - Response Length In PostRequestHandlerExecute?
Jun 24, 2010I want to find out exactly how long the Response sent to the user was, after the fact, for logging purposes. Is there any way to do this from an HttpModule in asp.net (in the PostRequestHandlerExecute event).
View 2 RepliesHow To Validate Password Of Maximum Length
May 5, 2010i want to validate my password textbox that it should be minimum length of 7 charsthe code i m using is this
Code:
if (textbox1.text.legth>7)
{
label1.text=""valid";
}
else
{
label1.text="invalid";
}
now the problem is this is it everytime check when the page is postback i.e when ever page is return from server.