dbnull
Null safe way to get values from an IDataReader
(LocalVariable)ABC.string(Name) = (IDataReader)dataReader.GetString(0); This name value is coming from database.[详细]
2022-12-26 01:25 分类：问答ASP.Net check value with DBNULL
I have the following code foreach (DataRowView dr in Data) { if (dr == System.DBNull.Value) { nedID = 1; } }[详细]
2022-12-23 17:27 分类：问答Operand type clash: nvarchar is incompatible with image
I\'m using a SQL Server 2008 stored procedure to create a new record with this syntax: cmd.Parameters.Add(\"@photo\", DBNull.Value)[详细]
2022-12-23 00:43 分类：问答Passing Null/empty string to Oracle stored procedure from asp.net
We 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 paramete[详细]
2022-12-21 19:53 分类：问答How can DBNull not equal DBNull
I have the following line of code if (DBNull.Value.Equals(o) || o != null) where o is object o in row.ItemArrayI keep getting an error of -->[详细]
2022-12-16 02:51 分类：问答Avoiding NULL object in HQL Query where clause
I have an entity which might have a parent entity. I want to run this query: select entity where entity.parent.id = 9[详细]
2022-12-13 21:15 分类：问答System.DBNull with data contract name not expected in WCF [duplicate]
This question already has answers here: Closed 10 years ago. Possible Duplicate: Why isn’t my DbNull a singleton when I deserialise it using XmlSerialiser?[详细]
2022-12-13 17:05 分类：问答
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