AJAX :: Null Or No Value Parameter?
Feb 20, 2010
I have a simple web-service and want to invoke it from a client. this service has a parameter but when I invoke it from client and send to it a parameter , in server side service run successfully but always parameter has no value and is null ( depend on parameter's type ex if it's string , value will be string and if it's int , value will be zero ) here is server and client code:
[Code]....
there was server and cliend ( proxy class code ) but when I run it and trace in server side always parameter that I send to it has no value.
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Sep 7, 2010
My issue is similar to [URL] how-to-use-the-value-of-a-selected-value-from-a-dropdownlist-populated-with-ajax but I am using ASP.NET, not PHP. I have a dropdownlist that is populated by another dropdownlist's current value through ajax. So if DDL A is 'NY', DDL B is populated with different data relating to 'NY'. I need that data to be posted back to the server because this affects an SQLDataSource parameter. However, as far as I can tell, the value is always null after postback resulting in the gridview to be empty.
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Feb 24, 2010
I am using dropdownlist in my view page with some values which will display corresponding ID(primary key of other table) in my database.If i leave my dropdownlist blank and save it in database then its showing null parameter error. Can you explain how to use this reference type to overcome this error
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Mar 14, 2011
I have this code in my code behind class. I keep getting this error that "Value cannot be null, parameter name source"
[Code]....
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Sep 18, 2010
[Code]....
If this information does not exist in the table displays this error:Value Can not BE null. Parameter name: Entity
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Aug 3, 2010
<cc1:ConfirmButtonExtender DisplayModalPopupID="ModalPopupExtender4" ID="ConfirmButtonExtender4"
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[code]...
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Nov 2, 2010
VS2010 .NET 4 - This simple app works using my local system. When I publish it on an IIS 7 web server, I get this error when the application runs this Linq query with a containes function.
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Server Error in '/' Application.Value cannot be null. Parameter name: textDescription: 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.ArgumentNullException: Value cannot be null.Parameter name: text Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ArgumentNullException: Value cannot be null.
Parameter name: text]
System.Data.Linq.SqlClient.SqlHelpers.GetStringContainsPattern(String text, Char escape, Boolean& usedEscapeChar) +595083
[code]...
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Apr 8, 2010
I am triing to bind the data to a listbox from sql server then got the error "Value cannot be null.Parameter name: key"
ddlCountry = new Obout.ComboBox.ComboBox();
ddlCountry.Width = 200;
ddlCountry.Height = 200;
ddlCountry.DataTextField = "Country";
ddlCountry.DataValueField = "Country";
sqlCommand = "SELECT [Country] FROM [tbl_LookupCountry] where [Country] IS NOT NULL";
SqlConnection sqlConCountry = new SqlConnection(connectString);
SqlCommand sqlCommCountry = new SqlCommand();
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Oct 29, 2010
I have got a problem about setting the optional parameter to NULL in sql sp. Initially I set all the parameters null in the sql sp. That's OK. But I would like to set the parameters to Null again if a particular parameter has a value of - 1 by using the "IF ELSE" statement block. However, the problem was that I was unable to set the parameter to NULL in the IF ELSE statement. So please correct my IF ELSE statement in the store procedure. This is really urgent and important for my project.
spGetMealsByNutritions]
@MealTypeID Int,
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@Dairy Bit = Null,
@Egg Bit = Null,
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@Veg Bit = Null,
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[code]...
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Aug 17, 2010
I'm having this very annoying issue.Trying to make ASP.NET profile work in my MVC2 application.This is the C# code:
[Code]....
Here is the web.config file:
[Code]....
And finally the controller action:
[Code]....
As soon as I submit the form I get an error. I can't even debug C# as the error occurs before stepping into
public ActionResult Create(UserProfile model, string submitButton)...The error is:
Server Error in '/' Application.
Value cannot be null.Parameter name: username
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.ArgumentNullException: Value cannot be null.Parameter name: username Source Error:
[Code]....
Stack Trace:
[Code]....
[ArgumentNullException: Value cannot be null.
Parameter name: username]
System.Web.Util.SecUtility.CheckParameter(String& param, Boolean checkForNull, Boolean checkIfEmpty, Boolean
[code]...
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Feb 18, 2010
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i'm using MVC 2, RC, and i have a controller method:
[Code]....
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[Code]....
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Mar 3, 2010
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Jan 26, 2011
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[code]...
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Aug 17, 2010
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Here's my route (first one is the culprit)
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"SubscriberAll",
"subscriber/{id}",
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);
routes.MapRoute(
"Default", // Route name
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);
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public ActionResult ShowAll(int id)
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Jun 25, 2012
How to check the query string value null, if null then display the default value instead of object reference error.
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[code]...
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I am creating a TableAdapter using corresponding wizard, with a GetDataByID() query. The select statement is like this:select * from books where ID = ?Thus books are filtered by ID. But in case a null is passed as a parameter, I want to select all records rather than none. Could you please tell me how I can do it?
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Oct 13, 2010
i have a WebSite project which i published, in the machine where i published the WebSite everything works smooth. when i moving it to the server, i got the Error:
Value cannot be null.Parameter name: type
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentNullException: Value cannot be null.Parameter name: type
and the details of it:
[code]...
How can i fix it?
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Dec 21, 2010
this is my html code [Code]....
i need to set null value to SqlDataSource Insert Parameter at runtime
i am used this code
[Code]....
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I have a SQLDataSource on an ASP.Net C# page. I want the ability to add a Control Parameter based on a DropDown List that will either display records that are either NULL or Not NULL In a Column. I have the following Code Snippet:
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I have article.aspx page that there is some Textboxs and fileupload control and insert when users click on btnInsert their data insert into database below is Behind code
protected void btnInsert_Click1(object sender, ImageClickEventArgs e)
{
string path = Server.MapPath(".") + "../image/House/article/pdf";
string filename = System.IO.Path.GetFileName(fuppdf.PostedFile.FileName);
string[] validext = { ".pdf" };
string ext = System.IO.Path.GetExtension(fuppdf.PostedFile.FileName);
if (Array.IndexOf(validext, ext.ToLower()) < 0)
[code]....
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