Send Null Value image field

  • Thread starter Thread starter Laurahn
  • Start date Start date
Laurahn said:
How can i send from VB 2005 a null value to a image field on a database in
SQL 2005
Click to expand...

Did you already try 'DBNull.Value' as the field's value?
 
I've tried with system.bdnull.value already, but i got this error:
a "System.DBNull" cannot be convert in '1 -dimensional Byte'

I'm working with "system.byte()"
 
Hi Laurahn,

I agree with what Herfried and Seth have suggested. We could set the image
field to DBNull.Value to save Null value in the corresponding field in the
Database.

I will illustrate this with a sample.

I Create a DataSet called 'DataSet1' in a WinForm project and drag a table
named 'Student' from the Server Explorer onto the DataSet1 designer. A
DataTableAdapter named 'StudentDataAdapter' is generated by the designer
automatically. The image field in the Student table is 'pic'.

The following code updates the 'pic' field of the first row to a Null value:

DataSet1.StudentDataTable dt = new DataSet1.StudentDataTable();
DataSet1TableAdapters.StudentTableAdapter ta = new
TestProject.DataSet1TableAdapters.StudentTableAdapter();
ta.Fill(dt);
dt.Rows[0]["pic"] = DBNull.Value;
ta.Update(dt);

Hope this helps.
If you have any question, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

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