How can I use Dictionary for my requirement?

Dorababu Meka

Hi all I am having a requirement like selecting multiple values and then to delete. I will have some list ofEMployee IDs along with Dates and PayID values.

I will get all this fields in multiple. Now i would like to add this to dictionary element like for particularEmpID I have to assign Date and PayID as keys.

I thought of writing like this

public struct MyValue
{
    public List lst;
    public List lst1;
    public List<DateTime> lstdt;
}

public class MyDictionary : Dictionary<int, MyValue>
{
    public void Add(int key, List lst1, List lst2, List<DateTime> lstDt1)
    {
        MyValue v1=new MyValue();
        v1.lst = lst1;
        v1.lst1 = lst2;
        v1.lstdt = lstDt1;
        this.Add(key, v1);
    }
}

But I am little bit confused in dealing with this so can any one give me an idea to implement as per my requirement.

This is my requirement if I have EmpID as 1 for this I will have Multiple PayIDs and Dates like 1 and System Date.

Even I will get Mutilple EmpIDs But if exists already in the dictionary as Key element I don't want to add it again.

(using 2.0 framework)

How can I do this?

4 Replies

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Vulpes15y ago
Accepted answer
The only problem I can immediately see is in this foreach statement where I've highlighted the changes you'll need for it to build:

foreach (int EmpID in d.Keys)
{
foreach (int pID in d[EmpID].lst)
{
sb.Append(pID);
}
foreach (DateTime dtTimes in d[EmpID].lstdt)
{
sb1.Append(dtTimes.ToString());
}
}
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Dorababu Meka15y ago
Yeah Vulpes i just checked it and corrected anyway thanks for ur help
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Dorababu Meka15y ago

Hi Vulpes thanks for your answer i tried as follows but i am getting error can you tell what's wrong

arrEmpID.Add(1);
    arrEmpID.Add(1);
    arrEmpID.Add(2);
    arrEmpID.Add(2);

    arrPay.Add(1);
    arrPay.Add(1);
    arrPay.Add(2);
    arrPay.Add(2);


    DateTime dt = DateTime.Now;
    DateTime dt1 = DateTime.Now.AddMinutes(1);
    DateTime dt2 = DateTime.Now.AddMinutes(1);
    DateTime dt3 = DateTime.Now.AddMinutes(1);

    arrPayID.Add(dt);
    arrPayID.Add(dt1);
    arrPayID.Add(dt2);
    arrPayID.Add(dt3);

    EmpIDs = (int[])arrEmpID.ToArray(typeof(int));
    Dates = (DateTime[])arrPayID.ToArray(typeof(DateTime));
    PayIDs = (int[])arrPay.ToArray(typeof(int));

for (int i = 0; i < EmpIDs.Length; i++)
    {
        if (!(d.ContainsKey(EmpIDs[i])))
        {
            List values = new List();
            List<DateTime> ldt = new List<DateTime>();
            d.Add(EmpIDs[i], values, ldt);
        }
        d[EmpIDs[i]].lst.Add(PayIDs[i]);
        d[EmpIDs[i]].lstdt.Add(Dates[i]);
    }

    foreach (int EmpID in d.Keys)
    {
        foreach (int pID in d[EmpID])
        {
            sb.Append(pID);
        }
        foreach (DateTime dtTimes in d[EmpID])
        {
            sb1.Append(dtTimes.ToString());
        }
    }

    Label1.Text = sb.ToString();
    Label2.Text = sb1.ToString();

I have my dictionary as follows

public struct MyValue
{
    public List lst;
    public List<DateTime> lstdt;
}

public class MyDictionary : Dictionary<int, MyValue>
{
    public void Add(int key, List lst1, List<DateTime> lstDt1)
    {
        MyValue v1 = new MyValue();
        v1.lst = lst1;
        v1.lstdt = lstDt1;
        this.Add(key, v1);
    }
}

Vulpes15y ago
Rather than place Lists within the struct, I'd place a scalar PayId and Date field within each struct, create a List of the structs and then use that as the value of the Dictionary:

using System;
using System.Collections.Generic;

struct MyValue
{
public int PayId;

public DateTime Date;

public MyValue(int payId, DateTime date)
{
PayId = payId;
Date = date;
}

public override string ToString()
{
return String.Format("{0} : {1}", PayId, Date.ToShortDateString());
}
}

class Test
{
static void Main()
{
int[] empIds = new int[]{1, 2};
List[] myValues = new List[2];
DateTime dt = DateTime.Today;

int[] payIds1 = new int[]{1, 2, 3};
DateTime[] dates1 = new DateTime[]{dt, dt.AddDays(1), dt.AddDays(2)};
myValues[0] = new List();

for(int i = 0; i < payIds1.Length; i++)
{
myValues[0].Add(new MyValue(payIds1[i], dates1[i]));
}

int[] payIds2 = new int[]{4, 5, 6};
DateTime[] dates2 = new DateTime[]{dt.AddDays(3), dt.AddDays(4), dt.AddDays(5)};
myValues[1] = new List();

for(int i = 0; i < payIds2.Length; i++)
{
myValues[1].Add(new MyValue(payIds2[i], dates2[i]));
}

Dictionary> dict = new Dictionary>();

// populate dictionary

for(int i = 0; i
{
if (!dict.ContainsKey(empIds[i]))
{
dict.Add(empIds[i], myValues[i]);
}
}

// retrieve
foreach(int k in dict.Keys)
{
foreach(MyValue mv in dict[k]) Console.WriteLine(mv);
Console.WriteLine();
}
Console.ReadKey();
}
}
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