RAD Studio VCL Reference
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TriggerReadRow.IsNull Method (int)
TriggerReadRow Class | TriggerReadRow Members | Borland.Data.DataStore Namespace | Description | See Also
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Returns true if the value of a given column is null.

Pascal
function IsNull(columnName: string): bool;
function IsNull(ordinal: Integer): bool;
C++
bool IsNull(string columnName);
bool IsNull(int ordinal);
Description

IsNull has several forms, depending on the input parameter:

  • Returns true if the value of a given column is null. The parameter columnName is the name of the column containing the wanted value.
  • Returns true if the value of a given column is NULL. The parameter ordinal is the ordinal of the column containing the wanted value.

 

See Also
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