Cannot implicitly convert type 'int' to 'System.Collections.

Mohan S

10y11.9kVisual Basic .NET

Hi Guys,

Program is to:

Find elements less than the input given in the list??

i/p : {1,2,3,4}

i/p : 4

o/p : {1,2,3}

ERROR: Cannot implicitly convert type 'int' to 'System.Collections.Generic.List

class Program

{

static void Main(string[] args)

{

Console.WriteLine("Please enter list of cities");

List input1 = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Please enter second city name");

int input2 = Convert.ToInt32(Console.ReadLine());

int output = UserProgramCode.GetElements(input1, input2);

Console.WriteLine(output);

Console.ReadLine();

}

class UserProgramCode

{

public static List GetElements(List input1, int input2)

{

List output = new List();

foreach (int li in input1)

{

if (li < input2)

{

output.Add(li);

}

if (output.Count >= 1)

{

output.Sort();

output.Reverse();

return output;

}

else

{

output.Add(-1);

return output;

}

7 Replies

Know the answer? Post it — somebody with the same question will find it here.

Ravi Patel10y ago
Accepted answer
Hi Mohan,

class Program
{
static void Main(string[] args)
{
Console.WriteLine("Please enter list of cities");
List input1 = new List();

for (int i = 0; i < 4; i++)
{
input1.Add(Convert.ToInt32(Console.ReadLine()));
}
//List input1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter second city name");
int input2 = Convert.ToInt32(Console.ReadLine());
List output = UserProgramCode.GetElements(input1, input2);
foreach (var item in output)
{
Console.WriteLine(item);
}
Console.ReadLine();
}
}
class UserProgramCode
{
public static List GetElements(List input1, int input2)
{
List output = new List();
foreach (int li in input1)
{
if (li < input2)
{
output.Add(li);
}
}
if (output.Count >= 1)
{
output.Sort();
output.Reverse();
return output;
}
else
{
output.Add(-1);
return output;
}
}
}
If you find my post as useful then accept my reply as answer. :)
Mohan S10y ago
Great Ravi, it worked thanks. Thanks everyone :)
Jignesh Trivedi10y ago
Hi,
Problem is your are converting int32 to List. you have write for loop to get the data one by one and insert in to list.
List inputs = new List();
for (int i = 0; i < 4; i++)
{
Console.WriteLine("Enter City:");
input1.Add(Convert.ToInt32(Console.ReadLine()));
}
hope this will help you.
Nishant Mittal10y ago
This will work absolutely fine..there is no issue with his code...

List input1 = new List();
for (int i = 0; i < 4; i++)
{
input1.Add(Convert.ToInt32(Console.ReadLine()));
}
Praveen Dhatrika10y ago
Oh k do like this

string FirstLine=Console.Readline();

convert.toint32(Firstkline);
Mohan S10y ago
Am getting the error for both lines.

ERROR: Cannot implicitly convert type 'int' to 'System.Collections.Generic.List

List input1 = Convert.ToInt32(Console.ReadLine());
List input2 = Convert.ToInt32(Console.ReadLine());

Please suggest me the conversion method.
Praveen Dhatrika10y ago
It should be again like

Listinput2 = Convert.ToInt32(Console.ReadLine());

because the return type for ReadLIne() is System.String