MVC :: Insert Empty Strings Into Database?
Apr 2, 2010
Using MVC 2 and VS 2010 RC.I have a varchar database column set to NOT NULL and I use the Entity Framework to bind the column to a textbox. I want a user to be able to leave the textbox blank and have an empty string inserted into the database column. However, MVC is trying to set the property to null during the Create postback, which causes ModelState.IsValid to be false and subsequently the validation UI is triggered with the message "The value '' is invalid".Here is the model:
[Code]....
The controller:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Create(Candidate c )
{
if (ModelState.IsValid) // This is false when the textbox is left blank.
[code]...
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Jan 18, 2011
I 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.
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Jan 19, 2010
In this test application, I am filtering by two ControlParameters. As you can see in the first codeblock, both parameters have a default value of %. This code works great. However, in the second code block, please note that the Default Values are eliminated. The second code block works as long as neither Textbox's text is blank. For some reason, when .NET evaluates the filter expression and inserts "" into the expression, it seems to bug out and case none of my results to be filtered.
I am able to verify this behavior by setting the defaultvalue="" for each ControlParameter.Obviously I have found a workaround, but I would like to know why the FilterExpression breaks down when an empty string is provided.
Code Block 1:
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Oct 16, 2010
I'm trying to write a regular expression that allows positive & negative floating point numbers, but doesn't allow empty strings and characters.I have managed to create this
[Code]....
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Apr 22, 2010
I have just upgraded a project from MVC 1 to 2 and I have come across an issue with fields updated via UpdateModel which contain an emtpy string.
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Jan 6, 2010
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Aug 20, 2010
What is the proper way to check for null or empty strings on dynamic objects? This is the only solution I've found so far:
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Jan 27, 2010
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Sep 30, 2010
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Jan 15, 2010
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Mar 24, 2010
i want to insert regular, strings in sqldatasource.
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ID="sql3"
runat="server"
InsertCommand="insert
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SelectCommand="select
* from inbox"
ProviderName="System.Data.OleDb"
ConnectionString='<%$connectionstrings:
sql %>'>
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<asp:Parameter
Type="String"
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/>
<asp:Parameter
Type="String"
Name="title"
/>
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Type="String"
Name="sss"
/>
<asp:Parameter
Type="String"
name="to"
/>
<asp:Parameter
Type="String"
Name="saw"
/>
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Mar 31, 2011
I am using UDF to get data from a table.When the result is empty I want to add an empty row to it.How can I do that?
[code]...
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Jun 18, 2010
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Oct 13, 2010
This is completely frustrating and probably embarrassing as well. A while back I posted a similar question and resolved the issue. [URL]...scope_identity The program has been working ever since, until yesterday when as it turns out SCOPE_IDENTITY() started returning an empty string even though a record is being inserted. I am not sure what has changed since the fateful day.
[Code]...
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Oct 22, 2010
How to Convert empty string to Null value - Insert into a DB
[Code]....
[Code]....
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Jan 30, 2010
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L[code]....
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[Code]....
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[Code]....
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Jul 14, 2010
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<asp:Label ID="Label2" runat="server" Text="Accession # "></asp:Label>
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[Code]....
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Feb 1, 2010
if i select a blank field and then insert to the drowdownlist in repeater.
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Mar 23, 2010
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[Code]....
SQL(part of stored proc)
[Code]....
with in button click event stored procedure is called to return search results.
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