DataTable.ToDictionary
Overview
Returns a DataTableDictionary by specified columns as key value to fast accessing.
DataTableDictionary myDataTable.ToDictionary(columns: string, separator: string)
Arguments
string columns
Comma or semicolon separated column names. If not specified error is thrown.
string separator
Separator to use as dictionary key when multiple columns specified. If not specified "." value is used by default.
Remarks
When columns argument contains an invalid column which is not in DataTable error is thrown.
If multiple columns shares same key, dictionary value would be array of data table row.
Example
Convert users to a dictionary
var employeeTable = $Database.Get({
Parameters : {
TargetSchema : 'HR',
TargetTable : 'Employee'
}
});
var employeeList = employeeTable.ToDictionary('RegistryNumber');
// employeeList now contains
// {
// "1234" : { Id : "ABC", RegistryNumber: "1234", StartDate: ... }
// "4567" : { Id : "DEF", RegistryNumber: "4567", StartDate: ... }
// }
var employee = employeeList.Get("12345");
Example
Using multiple columns
var employeeTable = $Database.Get({
Parameters : {
TargetSchema : 'HR',
TargetTable : 'Employee'
}
});
var employeeList = employeeTable.ToDictionary('Id,RegistryNumber');
// employeeList now contains
// {
// "ABC.1234" : { Id : "ABC", RegistryNumber: "1234", StartDate: ... }
// "DEF.4567" : { Id : "DEF", RegistryNumber: "4567", StartDate: ... }
// }
var employee = employeeList.Get("ABC.1234");
Copyright © 2010 - 2023 Emakin. All rights reserved.