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

Gets a collection of changed member elements for array and structure variables.

[Visual Basic]

Public ReadOnly Property ChangedMembers() As String

  Public Get

  End Get

End Property

[C#]

public string[] ChangedMembers { public get; }

Remarks

通过连接一个结构或数组类型的变量，有可能获得这个列表中那些价值改变的元素。

Example

Reading values from structure elements

Variable structVar = new Variable(cpuObj,"stVar");
structVar.Connect();
structVar.Active = true;
 
// 创建事件处理程序
structVar.ValueChanged += new VariableEventHandler(Var_ValueChanged);
...
...
private void Var_ValueChanged(object sender, VariableEventArgs e)
{
    Variable tmpVar = (Variable)sender;
    if (tmpVar.Value.DataType == DataType.Structure )
    {
        // 迭代ChangedMembers属性
        foreach ( String strVar in e.ChangedMembers )
        {
            // 通过字符串索引访问数值 -> tmpVar.Value["subSt.subElem_INT"]
            labelText.Text += String.Format("{0}   {1}\n",strVar,tmpVar.Value[strVar].ToString());
        }
    }
    ...
    ...
}

See Also

VariableEventArgs Class | BR.AN.PviServices Namespace

---

Generated from assembly BR.AN.PviServices [8.1.0.4]