How to map to a Dictionary object from database results using Dapper Dot Net?

Question

If I have a simple query such as:

string sql = \"SELECT UniqueString, ID  FROM Table\";

and I want to map it to a dictionary object such as

Answer 1

Dapper also has an extension method for ExecuteReader. So, you could also do this:

var sql = "SELECT UniqueString, ID  FROM Table";
var rows = new List<Dictionary<string, int>>();
using (var reader = cn.ExecuteReader(sql)) {
    while (reader.Read()) {
        var dict = new Dictionary<string, int>();
        for (var i = 0; i < reader.FieldCount; i++) {
            dict[reader.GetName(i)] = reader.GetInt32(i);
        }
        rows.Add(dict);
    }
}

This approach works without knowing the column names. Moreover, if you don't know the data types, you could change Dictionary<string,int> to Dictionary<string,object> and GetInt32(i) to GetValue(i).