嵌套类属性

Question

我对C＃相当陌生，在将对象添加到类中的类时遇到问题。它总是告诉我“使用'new'关键字创建对象实例”。

这是我的课程：

public class Info
{
    public List<SourceInfo> sourceInfo { get; set; }
}

public class SourceInfo
{
    public short id { get; set; }
    public string name { get; set; }
    public string icon { get; set; }
    public short subpage { get; set; }
    public short xpoint { get; set; }
    public short mediaPlayerId { get; set; }

    public SourceInfo(short ID, string NAME, string ICON, short SUBPAGE, short XPOINT, short MEDIAPLAYERID)
    {
        id = ID;
        name = NAME;
        icon = ICON;
        subpage = SUBPAGE;
        xpoint = XPOINT;
        mediaPlayerId = MEDIAPLAYERID;
    }

这是我的代码：

    Info configSelect = new Info();

    private void btnSave_Click(object sender, EventArgs e)
    {
        try
        {
            configSelect.sourceInfo.Add (new SourceInfo(Convert.ToInt16(txtSrcId.Text),
                txtSrcName.Text, txtSrcIcon.Text, Convert.ToInt16(txtSrcSubpage.Text),
                Convert.ToInt16(txtSrcXpoint.Text), Convert.ToInt16(txtSrcMPId.Text)));

            WriteFile(configSelect);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex);
            throw;
        }

Answer 1

您的Info类需要像这样构造。寻找的“新”是您的Info类中的List sourceInfo。

public class Info
{
    private List<SourceInfo> _sourceInfo = new List<SourceInfo>();

    public List<SourceInfo> sourceInfo
    {
        get { return this._sourceInfo; }
        set { this._sourceInfo = value; } 
    }
}