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Validate 方法

Allows the host to determine if there are invalid settings that will prevent the ForEachEnumerator from executing successfully.

命名空间：  Microsoft.SqlServer.Dts.Runtime
程序集：  Microsoft.SqlServer.ManagedDTS（在 Microsoft.SqlServer.ManagedDTS.dll 中）

语法

声明
Public Function Validate ( _
    connections As Connections, _
    variableDispenser As VariableDispenser, _
    infoEvents As IDTSInfoEvents, _
    log As IDTSLogging _
) As DTSExecResult
用法
Dim instance As ForEachEnumeratorHost
Dim connections As Connections
Dim variableDispenser As VariableDispenser
Dim infoEvents As IDTSInfoEvents
Dim log As IDTSLogging
Dim returnValue As DTSExecResult

returnValue = instance.Validate(connections, _
    variableDispenser, infoEvents, log)

public DTSExecResult Validate(
    Connections connections,
    VariableDispenser variableDispenser,
    IDTSInfoEvents infoEvents,
    IDTSLogging log
)

public:
virtual DTSExecResult Validate(
    Connections^ connections, 
    VariableDispenser^ variableDispenser, 
    IDTSInfoEvents^ infoEvents, 
    IDTSLogging^ log
) sealed

abstract Validate : 
        connections:Connections * 
        variableDispenser:VariableDispenser * 
        infoEvents:IDTSInfoEvents * 
        log:IDTSLogging -> DTSExecResult 
override Validate : 
        connections:Connections * 
        variableDispenser:VariableDispenser * 
        infoEvents:IDTSInfoEvents * 
        log:IDTSLogging -> DTSExecResult 

public final function Validate(
    connections : Connections, 
    variableDispenser : VariableDispenser, 
    infoEvents : IDTSInfoEvents, 
    log : IDTSLogging
) : DTSExecResult

参数

返回值

类型：Microsoft.SqlServer.Dts.Runtime. . :: . .DTSExecResult
A DTSExecResult enumeration that indicates the outcome of the validation.

实现

IDTSForEachEnumerator. . :: . .Validate(Connections, VariableDispenser, IDTSInfoEvents, IDTSLogging)

注释

The Validate method reviews properties and settings for inaccuracies or incorrect settings. The method does not touch data, or connect to data sources to validate connections. However, it ensures that required fields are populated and contain appropriate values. The fields that are validated differ depending on what object is being validated.

The primary use of Validate is when writing a custom task. The Validate method is called by the SSIS Designer when a task is dropped onto the design surface and again, potentially multiple times, when properties are being set. However, in code, the Validate method on individual objects is not commonly used, as it is recommended that you call the Validate method on the Package when you need to validate objects. However, the method is available on individual objects should you find a unique circumstance where it is needed.

The Validate method is overridden in custom tasks, either for validation of the object when used in the SSIS Designer, or when called by code. For more information on writing the Validate method for a custom task, see 编写自定义任务代码.

示例

The following code example shows how to validate objects using the Validate method of the Package object.

DTSExecResult myresult = pkg.Validate(myPkgConnections, myPkgVariables, myIDTSEvents, myIDTSLogging);

Dim myresult As DTSExecResult =  pkg.Validate(myPkgConnections,myPkgVariables,myIDTSEvents, myIDTSLogging)