Can Initialize Var With Null Or Some Empty Variable
May 25, 2010Can i initialize var with null or some empty variable.
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Check Whether DateTime Data Type Variable Is Null / Empty?
Oct 6, 2010How i do check whether DateTime data type variable is null/empty in asp.net ?
View 5 RepliesForms Data Controls :: Displaying A Null Or Empty Cell For A Null Datetime Database Value In Gridview?
Dec 6, 2010I have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
I am using similar architecture to the Imar Spaanjaars example of a tiered solution. With a few small tweeks it has worked well for me for ages. I am passing a List<Database> to my object datasource which connects to my gridview.
Web Forms :: Session Variable Is Null When It Shouldn´t Be Null?
Mar 18, 2010I have a problem with a SessionVariable. I will explain what is happening:
1. From the default.aspx I send Session["LoginByAdmin"] = "Dummy"; and then redirect to this page where I have the code below. So the Page_Load sees that this Session["LoginByAdmin"] != null and enter this page. This works fine !
2. In the Page_Load, I later fill a ListBox1 with foldernames.
3. With Button1_Click1, I will now delete the choosen Folder in the ListBox1 wich works fine the first time and the ListBox updates the new existing folders in the ListBox. (I have wrapped this inside an updatepanel)
The problems comes now when I try to delete a choosen folder in the ListBox1 the second time in a row. When I select a Folder in the ListBox1 and now Press Button1, I will be redirected to "Default.aspx". This meens that this code is running: (That meens that Session["LoginByAdmin"] == null and I have not set this to null anywhere. This is my big question how this variable can be = null here?
if (Session["LoginByAdmin"] == null)
Response.Redirect("Default.aspx");
break;
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ADO.NET :: Check Var Variable Is Empty?
Mar 30, 2011how to check var variable is empty
View 3 RepliesADO.NET :: SP From Linq Returns Empty Or Null Value
Feb 15, 2011I have a class library which has my LINQ doc in it. I added a stored procedure and I get the following in my .dbml.layout :
[Code]....
I include a reference to the dll of the class library to my web project and I get an error about value being returned as int where I am trying to put contents into a datalist or similar.
Code in class that calls this SP :
[Code]....
So I switched code to the following in my dbml.layout document :
[Function(Name="dbo.sp_newsSearch")]public IEnumerable<news_search_result> sp_newsSearch([Parameter(DbType="VarChar(200)")] string searchVal){IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), searchVal);return ((IEnumerable<news_search_result>)(result.ReturnValue));}
And included the following in an external file news_search_result.cs
[Code]....
But now I just get nothing returned. Is this wrong way of calling a SP via LINQ? or have I just put the wrong return type on my LINQ class?
Empty Diagnosis Or Lack Of One Variable In SQL Server?
Sep 23, 2010I want to recongize that a nvarchar variable in stored procedure is null or not null.
and this example :
DECLARE @Count int;
SET @Count = (SELECT Count(Fld) FROM Tbl)
if there is no row how much whould be the value of @Count?????
zero or null?
Web Forms :: How To Check Whether The Int Parameter Is Empty Or Null
Aug 17, 2010I have set the value of an int parameter to the attribute of a textbox.The textbox can be empty or null, how to check whether the parameter is empty or null?
View 5 RepliesMVC :: Exception Calling UpdateModel - Value Cannot Be Null Or Empty
Apr 8, 2010This is probably something silly I'm missing but I'm definitely lost. I'm using .NET 4 RC and VS 2010. This is also my first attempt to use UpdateModel in .NET 4, but every time I call it, I get an exception saying Value cannont be null or empty. I've got a simple ViewModel called LogOnModel:
[Code]....
My view uses the new strongly typed helpers in MVC2 to generate a textbox for username and one for the password. When I look at FormCollection in my controller method, I see values for both coming through.
And last but not least, here's are post controller methods:
[Code]....
why UpdateModel would be throwing this exception?
State Management :: Empty Session Variable Comparison?
Feb 14, 2011I have this code in a button click event:
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When the page is first opened, Session("LeverancieFilterExpression")) is supposed to be blank or empty so the next statement should be executed but this is not happening. Can anyone explain why? I have the .IsNullOrEmpty method elsewhere in the program and it seems to work. Also, I have
[Code]....
in the page load.
How To Show The Header If The List Is Null Or For A Empty Gridview
Jan 11, 2010I am using a Gridview with datasource is a List. How can I show the header if the List is null or for a empty gridview?
View 4 RepliesAccess :: How To Convert Empty String To Null Value - Insert Into A DB
Oct 22, 2010 How to Convert empty string to Null value - Insert into a DB
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DataSource Controls :: How To ObjectDataSource NULL To Empty String
Nov 26, 2010I have pass following SQL Query to the through ObjectDataSource
[Code]....
And I am passing parameter through QueryString and My idea is like when empty string is pass it should show me all records but when I am passing empty string ObjectDataSource is making NULL and I am not getting desire result
Vb.net - How To Insert NULL Into Database If Form Field Is Empty
Jan 18, 2011I have a form and stored procedure that inserts the data from the form. It works fine except that if a field isn't filled in it doesn't insert a NULL into sql it inserts "".
I've tried a few different ways but none seem to insert NULL, the one below still inserts "", can anyone point me in the right direction.
Here is the required part of the code, if you require more just let me know.
[code]....
So if I enter nothing into address1 field it should write NULL to screen but it always writes NOT NULL.
Insert Element With Empty String For Null Values
Jan 30, 2010For coonverting Linq to DataTable I am using the following Extension Method(Taken from Stackoverflow)
L[code]....
The Extension Method creates XML file.But for null values no element is created in XML file.Say if Commission field is null then commission element is missing in Xml generation.
I want to insert element with empty string for null values (ref type) and (0.00) for decimals and (0) for integers. where do i need to make change?
DataSource Controls :: How To Check For Both Empty And Null Fields
Jan 28, 2010How do I check if my value is empty AND Isnull? I need to check for both, using ISNULL is not enough because the data can change just so that it is empty.
how I can change my query to accommodate this?
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Security :: How To Easily Empty/null Out Profile State
Feb 11, 2010I'm using profiles to save control settings of users.
I have a check box that enables them to 'enable' saving their settings.
rather than cycling through each parameter, and setting them to Null,
is there a way I can do something like:
Profile.Something = Null
[URL]
SQL Server :: Return Results Where Field Is Not Null And Not Empty?
Feb 27, 2011i want my query to return results where the field address is not empty or null
however, the query i have is still returning results where address is empty i.e. ' ' .
Web Forms :: What's Simplest Method Of Checking For Null - Empty Text With Vb
Feb 20, 2011Is there one simple test that a person can do that covers all options where there could be a null, or "" value. When I google, I see so many options. I see:
if txtBox1.text IsNot nothing
if txtBox1.text.toString isNot nothing
if txtBox1.text <> ""
if txtBox1.text.toString <> ""
if isNull(txtBox1)
Is there on test that can cover them all?
WCF / ASMX :: Client DataContract Has Empty/null Values From Service?
Mar 26, 2010I have a simple WCF service that returns the time from the server. I've confirmed that data is being sent by checking with Fiddler. Here's the result object xml that my service sends according to fiddler.
[Code]....
Literally the only difference is the namespaces within the application. But still the values being returned are null, empty or a .NET default.
Checking For Empty Array - Get Object Refernce Set To Null Error
Oct 19, 2010How do i check for empty array?
If I write
If Not ls_filename.Length = 0 then
....
End If
I get object refernce set to null error
Web Forms :: How To Show Select Country When Data Value Is Empty Or Is Null
Jan 4, 2010If the datavalue which is empty and not exist in the dropdownlist data source, it will prompt error. How to overcome??I want it will show 'Select Country' when data value is empty or is null.
<asp:DropDownList ID = "ddllabelCountry"
DataSourceID="objCountry"
DataTextField="CountryName"
DataValueField="CountryCode"
EnableViewState="true"
[code]...
Passing Null / Empty String To Oracle Stored Procedure?
Mar 1, 2010We have an ASP.NET web service that invokes a stored procedure on our DB (Oracle 11g). The problem is that the call to the procedure blows up every time an empty string is passed as one of the parameters. We're seeing an ORA-01084 error, which indicates to me that call is failing before the procedure is actually run.
Here's the procedure, minus some logic that I believe is not relevant:
[Code]....
As an experiment, I modified the web service to pass null rather than an empty strings. When null is passed in, I see an error indicating "wrong number or types of arguments in call to 'CREATEREPORT."
I also tried passing DBNull.Value whenever the params were null/empty, but that resulted in the error
Parameter 'p_column_id': No size set for variable length data type: String.
(Of course, p_column_id was the empty parameter in this case).
So, how can I successfully pass empty strings as parameters to my stored procedure? We definitely want to allow the p_column_id parameter to be empty.
DataSource Controls :: Sql Constraint To Convert Empty String To Null?
May 10, 2010Sql constraint to convert empty string to null
View 7 RepliesSql Server - Textbox Control Doesn't Return NULL When It Is Empty
Mar 16, 2010In reference to this question that I just asked, [URL] it appears that for some reason, an empty text box's value is not being fed to SQL Server as NULL, as it ought to be.
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