private static string getoperation(OperaitonType o, string fieldname)
{
if (o == OperaitonType.addfield)
{
return("adding column " + fieldname + " in");
}
else if (o == OperaitonType.addkey)
{
return("adding primary key " + fieldname + " in ");
}
else if (o == OperaitonType.alterfield)
{
return("altering column " + fieldname + " attributes in ");
}
else if (o == OperaitonType.dropfield)
{
return("droping column " + fieldname + " in ");
}
else if (o == OperaitonType.dropkey)
{
return("droping primary key in ");
}
else
{
return(" altering table in ");
}
}
public TableSchemaException(string tablename,
string fieldname,
OperaitonType operation,
string message,
System.Exception ex)
: base(processMessage(tablename,
fieldname,
operation, message))
{
}
public TableSchemaException(string tablename,
string fieldname,
OperaitonType operation,
string message)
: base(processMessage(tablename, fieldname, operation, null))
{
TableName = tablename;
Operation = operation;
FieldName = fieldname;
}
private static string processMessage(string tablename,
string fieldname,
OperaitonType operation,
string message)
{
if (message == null)
{
return("Error while " + getoperation(operation, fieldname) + " " + tablename);
}
else
{
return("Error while " + getoperation(operation, fieldname) + " " + tablename + ":" + message);
}
}
public TableSchemaException() : base()
{
TableName = "Unknown table name";
Operation = OperaitonType.unknown;
}
