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I converted a music file into a byte, and now I need to know how to convert a byte into an int.
I've tried the following, but it failed:
BitConverter.ToInt32(array, 0);
It would be helpful to know what "failed" means: did it not compile? Did it throw and exception? If so, what was the full message of the exception?
In any case, BitConverter.ToInt32 looks at exactly 4 bytes and will throw an exception if your array has less than 4 bytes.
If you want to convert a single byte to an int, just assign it. It will be implicitly casted.
byte myByte = 0;
int myInt = myByte;
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So I created an array with 100 variables using Enumerable.Range. The data type is limited to Int32.
Problem
How can I create the same array with SByte?
Am I right in thinking I would need to use a loop to create and index the variables?
I have looked around online and most results touch on declaring counting variables for the loop but not using a loop to declare variables
Just cast them:
SByte[] array = Enumerable.Range(0, 100).Select(i => (SByte) i).ToArray();
note that SByte is not cls compliant, you might want to use short instead.
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I have a method that pseudo-randomly encrypts a byte array. I would like to convert the encrypted byte-array to a C# int (4 bytes), while observing a user-specified lower and upper bound (e.g. give me a number between 1 and 10)
What is the most secure and performant way of achieving this?
You could use System.ByteConverter.ToInt32(arr, start_index).
From your description of the array, the start index would likely be zero.
I am not sure what you mean by upper and lower bound, but if you mean you want a random number, you could use a variety of functions to get a value in between the two numbers. If you have semi-uniform distribution, the modulus function would work nicely. In that case, your random number would simply be lowerBound + (System.ByteConverter.ToInt32(arr, start_index) % (upperBound - lowerBound)).
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I have decimal values in the database. I want to show the decimal value in it. How to convert decimal values into it.
int vatprice;
dt.Load(cmd.ExecuteReader());
vatprice = Convert.ToInt32(dt.Rows[0][5].ToString());//getting error here
As per your requirement, round decimal up to 2 place using following way :
1) Use Math.Round().
var vatprice= Convert.ToDecimal(Math.Round(dt.Rows[0][5], 2));
2) second way is
var vatprice=Convert.ToDecimal(dt.Rows[0][5].ToString ("#.##"));
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I have used a SqlQuery function to run an stored procedure. My Stored Procedure returns IEnumerable<String>. The return data of SqlQuery() is DbRawSqlQuery<IEnumerable<String>>. How can I convert it to IEnumerable<String>?
I'm guessing you have some code that looks like this:
var raw = context.Database.SqlQuery<IEnumerable<string>>(/*SQL*/);
What you probably want instead is something like this:
var raw = context.Database.SqlQuery<string>(/*SQL*/);
The type argument to SqlQuery<TElement> should be the type of the element in the sequence returned.
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I am trying to convert a type array to a string. I have done my research and nothing seems to be working for me. Here is my code,
if (row.Table.Columns.Contains("DataRow") && !Convert.IsDBNull(row["DataRow"]))
{
byte[] rowData;
if(Byte.TryParse(row["DataRow"].ToString(), out rowData)
{
dbModel.DataRow= rowData;
}
else
{
return null;
}
I am trying to initialize and assign the array to the "host" and hold the value throughout the if statement. DataRow holds varBinary(128), the arguments in the second if statement give out an error that reads "The best overloaded method match for 'byte.TryParse(string, out byte)' has some invalid arguments
If you really are reading an array, try this:
if (row["DataRow"] != DBNull.Value)
{
byte[] data = (byte[])row["DataRow"];
}
If its coming back from the provider as a byte array, that will change it from object back to a byte array.