CriteriaOperator.ToCStyleString(CriteriaOperator, out OperandValue[]) Method

Converts the specified expression into its equivalent string in C# style.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Core.v21.2.dll

NuGet Package: DevExpress.Uwp.Controls

Declaration

C#

public static string ToCStyleString(
    CriteriaOperator criteria,
    out OperandValue[] criteriaParametersList
)

VB.NET

Public Shared Function ToCStyleString(
    criteria As CriteriaOperator,
    ByRef criteriaParametersList As OperandValue()
) As String

Parameters

Name	Type	Description
criteria	CriteriaOperator	A CriteriaOperator object that represents the expression to convert.
criteriaParametersList	OperandValue[]	Receives the values that are marked by a question mark character in the result string.

Returns

Type	Description
String	A string representation of the specified expression.

Remarks

This example demonstrate how to use the ToCStyleString method:

C#

OperandValue[] parameters;
CriteriaOperator filterCriteria = 
    CriteriaOperator.Parse("[Category] = ? AND [Price] < ?", out parameters);

parameters[0].Value = "Saloon";
parameters[1].Value = 100000;

// Returns "[Category] == ? && [Price] < ?"
string filterString = CriteriaOperator.ToCStyleString(filterCriteria, out parameters);

VB.NET

Dim parameters As OperandValue()
Dim filterCriteria As CriteriaOperator = _
    CriteriaOperator.Parse("[Category] = ? AND [Price] < ?", parameters)

parameters(0).Value = "Saloon"
parameters(1).Value = 100000

' Returns "[Category] == ? && [Price] < ?"
Dim filterString As String = CriteriaOperator.ToCStyleString(filterCriteria, out parameters)

To convert the string representation of an expression to its CriteriaOperator equivalent, use the CriteriaOperator.Parse method.

Note

The ToCStyleString method returns a string representation of the criteria which can be displayed in UI or saved in application log. However, this string is actually not SQL and cannot be considered as such.