如何在运行时动态向 ExpandoObject 添加属性？

Question

下面是我想要做的代码片段。

dynamic model = new ExpandoObject();

foreach (Control control in ConfigData.ActiveForm.Controls)
{
    string controlType = control.GetType().ToString();
    if (controlType == "System.Windows.Forms.TextBox")
    {
        TextBox txtBox = (TextBox)control;
        if (string.IsNullOrEmpty(txtBox.Text))
        {
            MessageBox.Show(txtBox.Name + " Can not be empty");
            return;
        }
        model[txtBox.Name] = txtBox.Text; // this gives error
    }
}

我想创建一个属性，其值的名称来自

txtBox.name

。

例如，如果

textBox.name

的值为

"mobileNo"

，我想向

mobileNo

添加一个名为

model

的属性。我该怎么做？

Answer 1

dynamic expando = new ExpandoObject();

// Add properties dynamically to expando
AddProperty(expando, "Language", "English");

public static void AddProperty(ExpandoObject expando, string propertyName, object propertyValue)
{
    // ExpandoObject supports IDictionary so we can extend it like this
    var expandoDict = expando as IDictionary<string, object>;
    if (expandoDict.ContainsKey(propertyName))
        expandoDict[propertyName] = propertyValue;
    else
        expandoDict.Add(propertyName, propertyValue);
}

感谢 Jay Hilyard 和 Stephen Teilhet

来源：https://www.oreilly.com/content/building-c-objects-dynamically/