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Validate 方法

Allows the container to determine if it contains invalid settings that will prevent it from executing successfully.

命名空間：  Microsoft.SqlServer.Dts.Runtime
組件：  Microsoft.SqlServer.ManagedDTS (在 Microsoft.SqlServer.ManagedDTS.dll 中)

語法

'宣告
Public Overridable Function Validate ( _
    connections As Connections, _
    variableDispenser As VariableDispenser, _
    infoEvents As IDTSInfoEvents, _
    log As IDTSLogging _
) As DTSExecResult
'用途
Dim instance As ForEachEnumerator
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 virtual DTSExecResult Validate(
    Connections connections,
    VariableDispenser variableDispenser,
    IDTSInfoEvents infoEvents,
    IDTSLogging log
)

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

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

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

參數

傳回值

型別：Microsoft.SqlServer.Dts.Runtime. . :: . .DTSExecResult
A value from the DTSExecResult enumeration that indicates the success or failure of the validation.

實作

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

備註

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 撰寫自訂工作的程式碼.

範例

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)