通过

Parse 方法 (String)

Parses the specified expression string.

命名空间：  Microsoft.SqlServer.Management.Dmf
程序集：  Microsoft.SqlServer.Dmf（在 Microsoft.SqlServer.Dmf.dll 中）

语法

声明
Public Shared Function Parse ( _
    input As String _
) As ExpressionNode
用法
Dim input As String
Dim returnValue As ExpressionNode

returnValue = ExpressionNode.Parse(input)

public static ExpressionNode Parse(
    string input
)

public:
static ExpressionNode^ Parse(
    String^ input
)

static member Parse : 
        input:string -> ExpressionNode 

public static function Parse(
    input : String
) : ExpressionNode

参数

返回值

类型：Microsoft.SqlServer.Management.Dmf. . :: . .ExpressionNode
An ExpressionNode object value that specifies part of an expression.

注释

Depending on the type of expression the object assigns the appropriate type when parsing. For example, the ExecuteSql statement specifies a function. If the expression contains a function then the Type property is set to Function.

The expression must conform to the Transact-SQL expression syntax:

property comparison_operator constantList

where

property: one of the facet properties

comparison_operator: = != > >= < <= [NOT]LIKE [NOT]IN

constantList: constant [, constantList]

注意注意

The Like operator uses the Transact-SQL syntax.

The expression can be extended using logical operators:

condition_expression logical_operator condition_expression

where

logical_operator: AND OR

示例

C#

string expressionStr = "ExecuteSql('Numeric','SELECT 1')";
ExpressionNode node = ExpressionNode.Parse (expressionStr);
TestAssertion.IsTrue (node.Type == ExpressionNodeType.Function, "Should be function");