Develop Reference

Map one class data to another class with iteration

I have a C# project and looking for simple solution for map one class object data to list of another class object.
This is my input class
public class RatesInput
{
public string Type1 { get; set; }
public string Break1 { get; set; }
public string Basic1 { get; set; }
public string Rate1 { get; set; }
public string Type2 { get; set; }
public string Break2 { get; set; }
public string Basic2 { get; set; }
public string Rate2 { get; set; }
public string Type3 { get; set; }
public string Break3 { get; set; }
public string Basic3 { get; set; }
public string Rate3 { get; set; }
}
This is my another class structure
public class RateDetail
{
public string RateType { get; set; }
public decimal Break { get; set; }
public decimal Basic { get; set; }
public decimal Rate { get; set; }
}
it has a object like below. (For easiering the understanding, I use hardcoded values and actually values assign from a csv file)
RatesInput objInput = new RatesInput();
objInput.Type1 = "T";
objInput.Break1 = 100;
objInput.Basic1 = 50;
objInput.Rate1 = 0.08;
objInput.Type2 = "T";
objInput.Break2 = 200;
objInput.Basic2 = 50;
objInput.Rate2 = 0.07;
objInput.Type3 = "T";
objInput.Break3 = 500;
objInput.Basic3 = 50;
objInput.Rate3 = 0.06;
Then I need to assign values to "RateDetail" list object like below.
List<RateDetail> lstDetails = new List<RateDetail>();
//START Looping using foreach or any looping mechanism
RateDetail obj = new RateDetail();
obj.RateType = //first iteration this should be assigned objInput.Type1, 2nd iteration objInput.Type2 etc....
obj.Break = //first iteration this should be assigned objInput.Break1 , 2nd iteration objInput.Break2 etc....
obj.Basic = //first iteration this should be assigned objInput.Basic1 , 2nd iteration objInput.Basic2 etc....
obj.Rate = //first iteration this should be assigned objInput.Rate1, 2nd iteration objInput.Rate2 etc....
lstDetails.Add(obj); //Add obj to the list
//END looping
Is there any way to convert "RatesInput" class data to "RateDetail" class like above method in C#? If yes, how to iterate data set?

Try this:
public class RatesList : IEnumerable<RateDetail>
{
public RatesList(IEnumerable<RatesInput> ratesInputList)
{
RatesInputList = ratesInputList;
}
private readonly IEnumerable<RatesInput> RatesInputList;
public IEnumerator<RateDetail> GetEnumerator()
{
foreach (var ratesInput in RatesInputList)
{
yield return new RateDetail
{
RateType = ratesInput.Type1,
Break = Convert.ToDecimal(ratesInput.Break1, new CultureInfo("en-US")),
Basic = Convert.ToDecimal(ratesInput.Basic1, new CultureInfo("en-US")),
Rate = Convert.ToDecimal(ratesInput.Rate1, new CultureInfo("en-US"))
};
yield return new RateDetail
{
RateType = ratesInput.Type2,
Break = Convert.ToDecimal(ratesInput.Break2),
Basic = Convert.ToDecimal(ratesInput.Basic2),
Rate = Convert.ToDecimal(ratesInput.Rate2, new CultureInfo("en-US"))
};
yield return new RateDetail
{
RateType = ratesInput.Type3,
Break = Convert.ToDecimal(ratesInput.Break3),
Basic = Convert.ToDecimal(ratesInput.Basic3),
Rate = Convert.ToDecimal(ratesInput.Rate3, new CultureInfo("en-US"))
};
}
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
}
And use:
var list = new RatesList(new List<RatesInput>() { objInput });
foreach (var item in list)
{
Console.WriteLine(item.Basic);
}

You can use Reflection to get the properties info like this:
var props = objInput.GetType().GetProperties();
var types = props.Where(x => x.Name.StartsWith("Type"))
.Select(x => x.GetValue(objInput)).ToList();
var breaks = props.Where(x => x.Name.StartsWith("Break"))
.Select(x => x.GetValue(objInput)).ToList();
var basics = props.Where(x => x.Name.StartsWith("Basic"))
.Select(x => x.GetValue(objInput)).ToList();
var rates = props.Where(x => x.Name.StartsWith("Rate"))
.Select(x => x.GetValue(objInput)).ToList();
List<RateDetail> lstDetails = new List<RateDetail>();
for (int i = 0; i < types.Count; i++)
{
lstDetails.Add(new RateDetail
{
RateType = types[i].ToString(),
Break = Convert.ToDecimal(breaks[i]),
Basic = Convert.ToDecimal(basics[i]),
Rate = Convert.ToDecimal(rates[i])
});
}

Get selected column from iqueryable

How can I return fieldList from an IQueryable object?
// fieldList="Code,Name";
var result = from Activity in query
select new
{
Code = Activity.Code,
Name = Activity.Name,
StatusCode = Activity.ClaimStatus.Name
};

DTO
public class CustomDto
{
public string Code { get; set; }
public string Name { get; set; }
public string StatusCode { get; set; }
}
Convert To Dto
var result = items.AsQueryable().Select(x => new CustomDto()
{
Code = x.Code,
Name = x.Name,
StatusCode = x.ClaimStatus
}).ToList();

return multiple reader.cast<>

All I want to do is return multiple reader.cast<> so that i can use 2 sqlcommands.
var first =reader.Cast<IDataRecord>().Select(x => new LocationInfo()
{
Names = x.GetString(0),
Values = Math.Round(x.GetDouble(1), 2).ToString("#,##0.00"),
ValuesDouble = x.GetDouble(1)
}).ToList();
reader.NextResult();
var second=reader.Cast<IDataRecord>().Select(x => new LocationInfo()
{
Names2 = x.GetString(0),
Values2 = Math.Round(x.GetDouble(1), 2).ToString("#,##0.00"),
ValuesDouble2 = x.GetDouble(1)
}).ToList();
All I want to do is return var first and var second. Please help :(
I'm using this Location.cs for parameters:
namespace MVCRealtime
{
public class LocationInfo
{
public string Names { get; set; }
public string Values { get; set; }
public double ValuesDouble { get; set; }
public string Names2 { get; set; }
public string Values2 { get; set; }
public double ValuesDouble2 { get; set; }
}
}

public static class ReaderHelper
{
public static IEnumerable<TElem> GetData<TElem>(this IDataReader reader, Func<IDataRecord, TElem> buildObjectDelegat)
{
while (reader.Read())
{
yield return buildObjectDelegat(reader);
}
}
}
// ...
var result = reader.GetData(x => new LocationInfo()
{
Names = x.GetString(0),
Values = Math.Round(x.GetDouble(1), 2).ToString("#,##0.00"),
ValuesDouble = x.GetDouble(1)
}).Take(2);
So you get 1st var in 1st element of the result and 2nd var in 2nd element.

SQLiteconnection dbType always Int32 despite SqlDbType Setting

I have a block of code that preps a query here:
var AssetTagParam = new SQLiteParameter("#AssetTagParam", SqlDbType.Int) { Value = item.AssetTag };
var VendorParam = new SQLiteParameter("#VendorParam", SqlDbType.Text) { Value = item.Vendor };
var DeviceParam = new SQLiteParameter("#DeviceParam", SqlDbType.Text) { Value = item.Device };
var AttributeParam = new SQLiteParameter("#AttributeParam", SqlDbType.Text) { Value = item.Attribute };
var DeviceTypeParam = new SQLiteParameter("#DeviceTypeParam", SqlDbType.Text) { Value = item.DeviceType };
var SystemParam = new SQLiteParameter("#SystemParam", SqlDbType.Text) { Value = item.System };
var LocationParam = new SQLiteParameter("#LocationParam", SqlDbType.Text) { Value = item.Location };
var OnLoanParam = new SQLiteParameter("#OnLoanParam", SqlDbType.Binary) { Value = item.OnLoan };
var NotesParam = new SQLiteParameter("#NotesParam", SqlDbType.Text) { Value = item.Notes };
var LastModifiedTimeParam = new SQLiteParameter("#LastModifiedTimeParam", SqlDbType.Text) { Value = item.LastModifiedTime };
var LastModifiedPersonParam = new SQLiteParameter("#LastModifiedPersonParam", SqlDbType.Text) { Value = item.LastModifiedPerson };
var IsDeletedParam = new SQLiteParameter("#IsDeletedParam", SqlDbType.Binary) { Value = item.IsDeleted };
SQLiteCommand insertSQL = new SQLiteCommand("INSERT INTO Inventory(AssetTag, Vendor, Device, Attribute, DeviceType, System, Notes, OnLoan, Location)" +
" VALUES (#AssetTagParam, #VendorParam, #DeviceParam, #AttributeParam, #DeviceTypeParam, #SystemParam, #NotesParam, #OnLoanParam, #LocationParam)", conn);
insertSQL.Parameters.Add(AssetTagParam);
insertSQL.Parameters.Add(VendorParam);
insertSQL.Parameters.Add(DeviceParam);
insertSQL.Parameters.Add(AttributeParam);
insertSQL.Parameters.Add(DeviceTypeParam);
insertSQL.Parameters.Add(SystemParam);
insertSQL.Parameters.Add(LocationParam);
insertSQL.Parameters.Add(OnLoanParam);
insertSQL.Parameters.Add(NotesParam);
insertSQL.Parameters.Add(LastModifiedTimeParam);
insertSQL.Parameters.Add(LastModifiedPersonParam);
insertSQL.Parameters.Add(IsDeletedParam);
For Reference, the Item class looks like this:
public class Item
{
public int AssetID { get; set; }
public int AssetTag { get; set; }
public string Vendor { get; set; }
public string Device { get; set; }
public string Attribute { get; set; }
public string DeviceType { get; set; }
public string System { get; set; }
public string Location { get; set; }
public bool OnLoan { get; set; }
public string Notes { get; set; }
public string LastModifiedTime { get; set; }
public string LastModifiedPerson { get; set; }
public bool IsDeleted { get; set; }
}
When I run this code, I will always run into the generic error:
Input string was not in a correct format.
After trying to figure out the source of this issue, assuming that I typed something wrong in the process, I ran into the issue that all my Param vars had their dbType set to Int32. I thought I was setting with the parameter SqlDbType.Text, but I must be misunderstanding this?
How do I set the dbtype of my inputs to Text instead of Int32?

The mistake I was making is using SqlDbType to define the type of data. I should have been using System.Data.DbType to define the data, so this:
var VendorParam = new SQLiteParameter("#VendorParam", SqlDbType.Text) { Value = item.Vendor };
Should instead be changed to this:
var VendorParam = new SQLiteParameter("#VendorParam", System.Data.DbType.String) { Value = item.Vendor };

compare properties in classes of list in class

What I've got are two classes which each contain Lists of Classes with propperties of different types. The first list is an updated version of the second and i need to find all differences (deleted/added classes in lists and updated classes).
public class ClassOfKb
{
public List<Data> KbData {get;set;}
public List<Info> KbInfo {get;set;}
}
class Data
{
public Guid ID {get;set}
public byte[] file {get;set}
public string name {get;set}
}
class Info
{
public Guid ID {get;set}
public string text {get;set}
public DateTime date {get;set}
}
ClassOfKb KbA = new ClassOfKb();
ClassOfKb KbB = new ClassOfKb();
first KbA and KbB will be filled from the same DataSet, then i delete, add and modify some of KbA Child-Classes.
now i need to compare KbA with KbB to find out where the differences are. i need the ID of deleted or added classes in KbA and the exact changes of modified Child-Classes properties. How would i do this? Preffered with Linq.

I suggest that create two comparers one for Data and one for Info
class DataComparer : IEqualityComparer<Data>
{
public bool Equals(Data x, Data y)
{
//logic to compare x to y and return true when they are equal
}
public int GetHashCode(Data d)
{
//logic to return a hash code
}
}
class InfoComparer : IEqualityComparer<Info>
{
public bool Equals(Info x, Info y)
{
//logic to compare x to y and return true when they are equal
}
public int GetHashCode(Info i)
{
//logic to return a hash code
}
}
The you can use Intersect and Except LINQ methods
IEnumerable<Data> DataInAandNotInB = KbA.KbData.Except(KbB.KbData,new DataComparer());
IEnumerable<Info> InfoInAandInB = KbA.KbInfo.Intersect(KbB.KbInfo,new InfoComparer ());

For simplicity, I skipped comparison of the byte array and DateTime data membes, only left the IDs and the string data members, but to add them you will need some small modification.
The test is very-very basic, but shows all three of the changes options:
static void Main(string[] args)
{
ClassOfKb KbA = new ClassOfKb();
ClassOfKb KbB = new ClassOfKb();
// Test data --------
Data data1 = new Data() { ID = Guid.NewGuid(), name = "111" };
Data data2 = new Data() { ID = Guid.NewGuid(), name = "222" };
Data data2_changed = new Data() { ID = data2.ID, name = "222_changed" };
Data data3 = new Data() { ID = Guid.NewGuid(), name = "333" };
Info info1 = new Info() { ID = Guid.NewGuid(), text = "aaa" };
Info info2 = new Info() { ID = Guid.NewGuid(), text = "bbb" };
Info info2_changed = new Info() { ID = info2.ID, text = "bbb_changed" };
Info info3 = new Info() { ID = Guid.NewGuid(), text = "ccc" };
KbA.KbData.Add(data1);
KbA.KbData.Add(data2);
KbA.KbInfo.Add(info1);
KbA.KbInfo.Add(info2);
KbB.KbData.Add(data2_changed);
KbB.KbData.Add(data3);
KbB.KbInfo.Add(info2_changed);
KbB.KbInfo.Add(info3);
// end of test data ---------
// here is the solution:
var indexes = Enumerable.Range(0, KbA.KbData.Count);
var deleted = from i in indexes
where !KbB.KbData.Select((n) => n.ID).Contains(KbA.KbData[i].ID)
select new
{
Name = KbA.KbData[i].name,
KbDataID = KbA.KbData[i].ID,
KbInfoID = KbA.KbInfo[i].ID
};
Console.WriteLine("deleted:");
foreach (var val in deleted)
{
Console.WriteLine(val.Name);
}
var added = from i in indexes
where !KbA.KbData.Select((n) => n.ID).Contains(KbB.KbData[i].ID)
select new
{
Name = KbB.KbData[i].name,
KbDataID = KbB.KbData[i].ID,
KbInfoID = KbB.KbInfo[i].ID
};
Console.WriteLine("added:");
foreach (var val in added)
{
Console.WriteLine(val.Name);
}
var changed = from i in indexes
from j in indexes
where KbB.KbData[i].ID == KbA.KbData[j].ID &&
(//KbB.KbData[i].file != KbA.KbData[j].file ||
KbB.KbData[i].name != KbA.KbData[j].name ||
//KbB.KbInfo[i].date != KbA.KbInfo[j].date ||
KbB.KbInfo[i].text != KbA.KbInfo[j].text
)
select new
{
Name = KbA.KbData[j].name,
KbDataID = KbA.KbData[j].ID,
KbInfoID = KbA.KbInfo[j].ID
};
Console.WriteLine("changed:");
foreach (var val in changed)
{
Console.WriteLine(val.Name);
}
Console.ReadLine();
}
}
public class ClassOfKb
{
public List<Data> KbData = new List<Data>();
public List<Info> KbInfo = new List<Info>();
}
public class Data
{
public Guid ID { get; set; }
public byte[] file { get; set; }
public string name { get; set; }
}
public class Info
{
public Guid ID { get; set; }
public string text { get; set; }
public DateTime date { get; set; }
}