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
| Code Block | ||
|---|---|---|
| ||
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
| Code Block | ||
|---|---|---|
| ||
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"); |