投射動態精巧的查詢

Question

我試圖將動態查詢從dapper轉換為IDictionary

        const string sql = @"SELECT Name, Street FROM Contact";
        dynamic query = null;

        using (var cn = Connection)
        {
            query = cn.Query<dynamic>(sql);
        }

        var rows = query as IDictionary<string, object>;

        foreach (var row in rows)
        {
            // Getting values and objects
        }

但是演員總是返回null。 任何線索？

Answer 1

您需要將各行轉換為IDictionary<string, object> ：

    const string sql = @"SELECT Name, Street FROM Contact";
    IEnumerable<dynamic> results = null;

    using (var cn = Connection)
    {
        results = cn.Query<dynamic>(sql);
    }

    foreach (var row in results)
    {
         var fields = row as IDictionary<string, object>;
         // do something with fields["Name"] and fields["Street"]
    }

Answer 2

使用“Cast <>”：

query.Cast<IDictionary<string, object>>()