<< 点击显示目录 >> 主页  PVI通信 > PVI帮助信息 > PVI Services > BR.AN.Namespace > BR.AN.PviServices > Variable Class > Variable Properties > Variable.DataValid Property

Gets the state of the instances data.

[Visual Basic]

Public ReadOnly Property DataValid() As Boolean

  Public Get

  End Get

End Property

[C#]

public bool DataValid { public get; }

Remarks

要访问实例的值，DataValid 必须为真。

Variable varArray = new Variable(cpuObj,"globArray");
varArray.Connect();
varArray.Active = true        // Set active = true to get data from the plc
..
..
..
// Connection event received ...
// Checking DataValid state
if ( varArray.DataValid )
    Int32 i = varArray.Value[3].ToInt32(null);

See Also

Variable Class | BR.AN.PviServices Namespace

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Generated from assembly BR.AN.PviServices [8.1.0.4]