I am trying to map Dapper Data to an Object. But am facing problem while mapping to Dictionary objects.
The Requirement is to map a Data Row to an Object.
Data Row
1 | Key1 | Value1
1 | Key2 | Value2
Expected Values
Id -> 1
Data -{{"Key1","Value1" }, { "Key2","Value2"}}
Map Code:
IDictionary<string, object> entity = new Dictionary<string, object>();
entity.Add("Id", "1");
entity.Add("Data_Key", new List<string>() { "Key1", "Key2" });
entity.Add("Data_Value", new List<string>() { "Value1", "Value2" });
var result=Slapper.AutoMapper.Map<TestEntity>(entity);
Entity Object
public class TestEntity
{
public int Id { get; set; }
public Dictionary<string,string> Data { get; set; }
}
Is there a way to achieve this ??
As the other user mentioned, it is impossible to achieve it through Slapper.Automapper.
But, I've found a workaround to achieve it.
I have created a TypeConverter, which accepts a JSON String and returns a Dictionary Object.
public class DictionaryConverter : ITypeConverter
{
public int Order => 110;
public bool CanConvert(object value, Type type)
{
// Handle Nullable types
var conversionType = Nullable.GetUnderlyingType(type) ?? type;
//Check if Type is a Dictionary
return conversionType.IsGenericType && conversionType.GetGenericTypeDefinition() == typeof(Dictionary<,>);
}
public object Convert(object value, Type type)
{
// Handle Nullable types
var conversionType = Nullable.GetUnderlyingType(type) ?? type;
//Create Empty Instance
object result = Activator.CreateInstance(type);
if (value != null)
{
try
{
result = JsonConvert.DeserializeObject(value as string, type);
}
catch (JsonException ex)
{
throw new Exception("Invalid JSON String while Converting to Dictionary Object", ex);
}
}
return result;
}
}