Version: 2022.1

QueryEngineFilterAttributeConstructor

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public QueryEngineFilterAttribute (string token, string[] supportedOperators);
public QueryEngineFilterAttribute (string token, stringComparison options, string[] supportedOperators);
public QueryEngineFilterAttribute (string token, string paramTransformerFunction, string[] supportedOperators);
public QueryEngineFilterAttribute (string token, string paramTransformerFunction, stringComparison options, string[] supportedOperators);

参数

token The identifier of the filter. Typically what precedes the operator in a filter (for example, "id" in "id>=2").
supportedOperators List of supported operator tokens. This list contains the supported operator tokens. Use null or an empty list to indicate that all operators are supported.
options String comparison options.
paramTransformerFunction Name of the parameter transformer function to use with this filter. Tag the parameter transformer function with the appropriate ParameterTransformer attribute.

描述

Create a filter with the corresponding token and supported operators.


public QueryEngineFilterAttribute (string token, bool useRegularExpression, string[] supportedOperators);
public QueryEngineFilterAttribute (string token, bool useRegularExpression, stringComparison options, string[] supportedOperators);
public QueryEngineFilterAttribute (string token, bool useRegularExpression, string paramTransformerFunction, string[] supportedOperators);
public QueryEngineFilterAttribute (string token, bool useRegularExpression, string paramTransformerFunction, stringComparison options, string[] supportedOperators);

参数

token The identifier of the filter or regular expression that matches the filters. Typically what precedes the operator in a filter (for example, "id" in "id>=2").
useRegularExpression Set this flag to true if the token is a regular expression.
supportedOperators List of supported operator tokens. This list contains the supported operator tokens. Use null or an empty list to indicate that all operators are supported.
options String comparison options.
paramTransformerFunction Name of the parameter transformer function to use with this filter. Tag the parameter transformer function with the appropriate ParameterTransformer attribute.

描述

Create a filter with the corresponding token and supported operators.

This constructor allows custom filters with regular expressions to be registered with an attribute.

// Define a regular expression filter for the property "property".
[MyObjectFilter("#([\\w.]+)", true)]
static Property FilterProperty(MyObjectType myObj, string filterMatch)
{
    if (myObj.property.name == filterMatch)
        return myObj.property;
    return Property.invalid;
}