Question

我有一个词典＆gt;其中第一组键应为列名，第二组键应为行名，值为内部字典的值。如何将其转换为C＃中的数据表？提前致谢。编辑：行名称是唯一的，并作为字典中的键出现。字典有点像矩阵。

Answer 1

这是我对它的抨击。

    static DataTable DictionaryToDataTable(Dictionary<string,Dictionary<string,string>> dictionary)
    {
        int index;
        string key = "YourPrimaryKeyColumnNameHere";
        DataTable dt = new DataTable();

        // Setting primary key allows you to perform Find() and IndexOf() later on
        dt.Columns.Add(key);
        dt.PrimaryKey = new DataColumn[] { dt.Columns[key] };

        foreach (var header in dictionary)
        {
            dt.Columns.Add(header.Key);
            foreach (var row in header.Value)
            {
                index = dt.Rows.IndexOf(dt.Rows.Find(row.Key));

                // Index will be -1 if the row isn't found, ie on the first iteration
                if (index < 0)
                {
                    // When creating a new row, start it with the unique primary key field
                    dt.Rows.Add(new[] { row.Key });
                    // We use dt.Rows.Count - 1 to get the last (newly added) row
                    dt.Rows[dt.Rows.Count - 1][header.Key] = row.Value;
                }
                else
                {
                    dt.Rows[index][header.Key] = row.Value;
                }
            }
        }
        return dt;
    }

转换字典<string，dictionary <string，=“”string =“”>＆gt;到数据表

1 个答案: