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by: Programmer |
last post by:
Hi All
Here is my problem
I'm using a SQLDataAdapter and DataSet
I use the method FillSchema(myDataset, SchemaType.Source)
The problem is that when i Check the default Values of the Dataset
i can see that the DefaultValue of the columns is system.dbnull!!!!
But in SQL Server i have put as default values in a bigint field the '0' and
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by: Andreas Palm |
last post by:
I have a dataset that has DBNull in certain columns, now when I write
out this one to XML, I only get the columns as elements that do have
data in it. However I do need also the empty colums as empty elements
in the XML. How to do that ?
I don't understand why there is no simple option to specify the output
format, or did I miss something ?
regards
andreas
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by: Brian Brane |
last post by:
I have properties that wrap DataRow columns as in:
public int aNumber
{ get{ return m_DataRow; }
set{ m_DataRow = value; } }
If the column happens to contain DBNull, I get a cast
exception since DBNull cannot be converted to int. I
wrote the following method that looks up the column's
data type and if it is a ValueType, returns the default
value for the ValueType.
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by: Patrick.O.Ige |
last post by:
When i try and use this (Where Unit is a column in my Table):-
If Unit Is DBNull.Value Then
Return "1"
Else
Return "2"
End If
I always have 2 returned! Even when Unit is NULL!
I want a case if a column is NULL the it xhould return '1 and if not '2'
How does DBNull.Value work?
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by: mjwills |
last post by:
All,
I am using VB.NET 1.0 / 2002. I am having trouble setting a column
default to "" (note that "" is not the same as Null / DBNull / Nothing)
in a typed dataset (to reflect the same database default)...
Below is a snippet...
<xs:element name="Customers">
<xs:complexType>
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by: vvenk |
last post by:
Hello:
When I try to do the following,
Dim liTemp As System.DBNull
If c.Value Is Nothing Then
newDataTableRow(c.Column.Key) = liTemp
Else
newDataTableRow(c.Column.Key) = c.Value
End If
I get the exception:
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by: PeterWellington |
last post by:
I have a column in a data table that stores enum values and assigns a default
value:
Dim dc As New DataColumn("TestEnumField", GetType(DayOfWeek))
dc.DefaultValue = DayOfWeek.Thursday
When I try to serialize/deserialize dataset schema, I get the error below
during deserialization:
"System.ArgumentException: The DefaultValue for column TestEnumField is of
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by: Greg P |
last post by:
I'm using VB 2005, and have drug and dropped datagridviews onto my form. The
default code that is generated for inserts tries to insert a value for the
auto generated primary key. Below is the generated code. I put ***** around
the problematic code. I've tried just removing this and it doesn't seem to
work. There may be more generated code I don't know about. I could remove
it but I am planning on doing a lot of refreshing of the data...
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by: Dave |
last post by:
If Iwant to check if dataset1.SelectQuery1.column1 ==
System.DBNull.Value. How do I do this? What I wrote above will give an error.
--
L. A. Jones
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by: Robert Bravery |
last post by:
HI all,
I have a column value returned to a string variable in my c# app. But the
return type is of system.dbnull. How can I convert that to a system.sting
Thanks
Robert
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by: marktang |
last post by:
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Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Hystou |
last post by:
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by: agi2029 |
last post by:
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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