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DMQueryTask.Validate 方法

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Verifies that the component is properly configured.

命名空間：  Microsoft.SqlServer.Dts.Tasks.DMQueryTask
組件：  Microsoft.SqlServer.DMQueryTask (在 Microsoft.SqlServer.DMQueryTask.dll 中)

語法

'宣告
Public Overrides Function Validate ( _
    connections As Connections, _
    variables As VariableDispenser, _
    events As IDTSComponentEvents, _
    log As IDTSLogging _
) As DTSExecResult
'用途
Dim instance As DMQueryTask 
Dim connections As Connections 
Dim variables As VariableDispenser 
Dim events As IDTSComponentEvents 
Dim log As IDTSLogging 
Dim returnValue As DTSExecResult 

returnValue = instance.Validate(connections, _
    variables, events, log)

public override DTSExecResult Validate(
    Connections connections,
    VariableDispenser variables,
    IDTSComponentEvents events,
    IDTSLogging log
)

public:
virtual DTSExecResult Validate(
    Connections^ connections, 
    VariableDispenser^ variables, 
    IDTSComponentEvents^ events, 
    IDTSLogging^ log
) override

abstract Validate : 
        connections:Connections * 
        variables:VariableDispenser * 
        events:IDTSComponentEvents * 
        log:IDTSLogging -> DTSExecResult  
override Validate : 
        connections:Connections * 
        variables:VariableDispenser * 
        events:IDTSComponentEvents * 
        log:IDTSLogging -> DTSExecResult

public override function Validate(
    connections : Connections, 
    variables : VariableDispenser, 
    events : IDTSComponentEvents, 
    log : IDTSLogging
) : DTSExecResult

參數

傳回值

型別：Microsoft.SqlServer.Dts.Runtime.DTSExecResult
A value from the DTSExecResult enumeration.

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)

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參考

DMQueryTask 類別

Microsoft.SqlServer.Dts.Tasks.DMQueryTask 命名空間