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DBNull is not the number zero or it is not an empty string value. DBNull is a singleton class, which means only this instance of this class can exist.
The following example calls the DBNull.Value.Equals method to determine whether a database field in a contacts database has a valid value. If it does, the field
I am using the following code for checking dbnull For example : if(System.DbNull.Value(dr("name")), "1",dr("name")). you can also check the
The DBNull class represents a nonexistent value. In a database, for example, a column in a row of a table might not contain any data whatsoever. The DBNull type is a singleton class, which means only one DBNull object exists. The DBNull.Value member represents the sole DBNull object.
3 May 2012 This should work. if (rsData["usr.ursrdaystime"] != System.DBNull.Value)) { strLevel = rsData["usr.ursrdaystime"].ToString(); }. also need to add
This class is also used in COM Interop to distinguish between a VT_NULL variant, which is associated with a null object, and a VT_EMPTY variant, which is associated with the DBNull.Value instance. DBNull is a singleton class, which means only one instance of this class can exist. That sole instance is DBNull.Value.
4 Oct 2012 Convert: There is a direct method available to Check for DBNull. Here is Net sample you can simply convert this code through this converter.
Isn't checking for DBNull exactly what the DataRow. .. For example, if you have null values in enum fields, otherwise default(MyEnum) risks first enum value
26 Mar 2014 DBNull represents a nonexistent value returned from the database. In a database, for example, a column in a row of a table might not contain
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