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Found 2628 Articles for Csharp
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To convert a Double value to an Int64 value, use the Convert.ToInt64() method.Int64 represents a 64-bit signed integer.Let’s say the following is our double value.double val = 23.951213e12;Now to convert it to Int64.long longVal = Convert.ToInt64(val);Let us see the complete example.Example Live Demousing System; public class Demo { public static void Main() { double val = 23.951213e12; long longVal = Convert.ToInt64(val); Console.WriteLine("Converted double {0:E} to Int64 {1:N0} value ", val, longVal); } }OutputConverted double 2.395121E+013 to Int64 23,951,213,000,000 value
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To convert a Byte value to an Int32 value, use the Convert.ToInt32() method.Int32 represents a 32-bit signed integer.Let’s say the following is our Byte value.byte val = Byte.MaxValue;;Now to convert it to Int32.int intVal = Convert.ToInt32(val);Let us see the complete example.Example Live Demousing System; public class Demo { public static void Main() { byte val = Byte.MaxValue;; int intVal = Convert.ToInt32(val); Console.WriteLine("Converted byte {0} to Int32 {1} value ", val, intVal); } }OutputConverted byte 255 to Int32 255 value
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To convert an Int32 value to a decimal, use the Convert.ToDecimal() method.Int32 represents a 32-bit signed integer.Let’s say the following is our Int32 value.int val = 2923;Now to convert it to decimal.decimal decVal = Convert.ToDecimal(val);Let us see the complete example.Example Live Demousing System; public class Demo { public static void Main() { int val = 2923; decimal decVal = Convert.ToDecimal(val); Console.WriteLine("Converted Int32 {0} to decimal {1:N2} value ", val, decVal); } }OutputConverted Int32 2923 to decimal 2,923.00 value
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The exception thrown when a null reference is passed to a method that does not accept it as a valid argument.Let us see an example.When we set a null parameter to int.Parse() method, then ArgumentNullException is thrown as shown below −Exampleusing System; class Demo { static void Main() { string val = null; int res = int.Parse(val); // error is thrown } }OutputThe following error is thrown when the above program is compiled since we have passed a null value.Unhandled Exception: System.ArgumentNullException: Value cannot be null.
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To get the bounds of a three-dimensional array, use the GetUpperBound() GetLowerBound() methods in C#.The parameter to be set under these methods is the dimensions i.e.Let’s say our array is −int[, , ] arr = new int[3, 4, 5];For a three-dimensional arrays, dimension 0.arr.GetUpperBound(0) arr.GetLowerBound(0)For a three-dimensional arrays, dimension 1.arr.GetUpperBound(1) arr.GetLowerBound(1)For a three-dimensional arrays, dimension 2.arr.GetUpperBound(2) arr.GetLowerBound(2)Let us see the entire example.Example Live Demousing System; class Program { static void Main() { int[, , ] arr = new int[3, 4, 5]; Console.WriteLine("Dimension 0 Upper Bound: {0}", arr.GetUpperBound(0).ToString()); Console.WriteLine("Dimension 0 Lower Bound: ... Read More
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Let’s say our three-dimensional array is −int[,,] arr = new int[3,4,5];To get the height and width i.e. the rows and columns.Array.GetLength(0) – for rows Array.GetLength(1) – for columnsExample Live Demousing System; class Program { static void Main() { int[,,] arr = new int[3,4,5]; Console.WriteLine(arr.GetLength(0)); Console.WriteLine(arr.GetLength(1)); Console.WriteLine(arr.GetLength(2)); } }Output3 4 5
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To get the rank of a three-dimensional array, use the Rank property.Set a three-dimensional array.int[,,] arr = new int[3,4,5]Now get the rank.arr.RankLet us see the complete code.Exampleusing System; class Program { static void Main() { int[,,] arr = new int[3,4,5] Console.WriteLine("Dimensions of Array : " + arr.Rank); } }
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Merge sequences using predicate with Zip method.Here are our arrays to be merged.int[] intArray = { 10, 20, 30, 40 }; string[] stringArray = { "Jack", "Tim", "Henry", "Tom" };Now let’s use the Zip method to merge both the arrays.intArray.AsQueryable().Zip(stringArray, (one, two) => one + " " + two)The following is our code.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { int[] intArray = { 10, 20, 30, 40 }; string[] stringArray = { "Jack", "Tim", "Henry", "Tom" }; var mergedSeq = intArray.AsQueryable().Zip(stringArray, (one, two) => one + " " + two); foreach (var ele in mergedSeq) Console.WriteLine(ele); } }Output10 Jack 20 Tim 30 Henry 40 Tom
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Use the LastorDefault() method to return the last element of a sequence or a default value if element isn’t there.The following is our empty list.List val = new List { };Now the following will not be able to display the last element since the list is empty. Therefore, the default would get display and error won’t be shown.val.AsQueryable().LastOrDefault();The following is the code.Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo { static void Main() { List val = new List { }; double d = val.AsQueryable().LastOrDefault(); Console.WriteLine("Default Value = "+d); ... Read More
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Perform Union on two sequences using the Queryable Union method.The following are our arrays.int[] arr1 = { 29, 40, 15, 55, 70, 30, 90 }; int[] arr2 = { 30, 36, 40, 18, 15, 55, 75 };Now, get the Union of the arrays using the Union method.arr1.AsQueryable().Union(arr2);Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { int[] arr1 = { 29, 40, 15, 55, 70, 30, 90 }; int[] arr2 = { 30, 36, 40, 18, 15, 55, 75 }; IEnumerable res = arr1.AsQueryable().Union(arr2); foreach (int a in res) Console.WriteLine("{0} ", a); } }Output29 40 15 55 70 30 90 36 18 75