c# - 如何附加到我的 KeyValuePair？

Question

我的 list返回 <string, string>显然。如何在我的 KeyValuePair 中附加第二个字符串并添加我从第二次数据库调用返回的 ID？

    // Database calls here

    KeyValuePair<string, string> parks = new KeyValuePair<string, string>();

    DataSet dset = new DataSet();

    var list = new List<KeyValuePair<string, string>>();

    list.Add(new KeyValuePair<string, string>("Select one", "0"));
    foreach (DataRow row in ds.Tables[0].Rows)
    {
        //My database calls including:
         db.AddInParameter(comm, "@pID", DBType.Int32, row[1]);
         dset = db.ExecuteDataSet(comm);
         string attr = dset.Tables[0].Rows[0]["Value"].ToString();
        list.Add(new KeyValuePair<string, string>(row[0].ToString() + " - " + attr, row[1].ToString()));

    }

    return list;

Answer 1

在KeyValuePair<TKey, TValue>键和值是只读的。你可以使用 Dictionary<string,string>为你工作并获得KeyValuePair<string, string>从它。

我认为这行得通:

// Database calls here
Dictionary<string, string> list = new Dictionary<string, string>();

list.Add("Select one", "0");
foreach (DataRow row in ds.Tables[0].Rows)
{

    list.Add(row[0].ToString(), row[1].ToString());

}

//Another database call that gets back an ID. I want to add/append this ID into my second string in my KeyValue Pair.

return list;

要附加第二个字符串，您可以使用 list["/*Your ID*/"]= YourData;

List<KeyValuePair<TKey, TValue>>不是好办法。就像你用一杯茶来灭火一样!