Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 7 years ago.
Improve this question
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.
Related
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 1 year ago.
Improve this question
I have a big function that returns a list of objects. I basically need the results to be put in to a text file. The list contains objects of a class with attributes string Index and integer count. I would want it to be written in a textfile like:
Index : Count fe.
BOOK_FROM_STORE : 27
Anybody has some guidance?
Parse the data held by your object to string and then write it to a text file.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 6 years ago.
Improve this question
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;
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 7 years ago.
Improve this question
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.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 8 years ago.
Improve this question
I don't understand what is wrong i did the same code with the insert and run well
Entity obj = new Entity();
.
.
.
obj.DEPID = decimal.Parse(((TextBox)GridView1.FooterRow.FindControl("txtDEPID")).Text);
myFactory.UpdateObject(obj);
The value that is returned by the
((TextBox)GridView1.FooterRow.FindControl("txtDEPID")).Text
Is not a decimal-like string. It contains some other Special Characters like alphabets etc.
While passing the values, you need to make sure that the values being passed match the values required. Check what is the value of this.
txtDEPID.Text;
Use it in a MessageBox, to check for the value. I'm sure there is some sort of non decimal part in the string. Which is causing the trouble while converting the String to Decimal.
MessageBox.Show(txtDEPID.Text);
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 9 years ago.
Improve this question
class baker: unit {}
class killer: unit{}
void Round(unit first, unit second, byte fA, byte sA)
{
how to create array of "unit first" type objects?
}
I pass baker or killer as a parameter and I want to clone this particular class in method, but I don't understand how
For the simple approach :
if(first is baker)
{
// Create array of bakers
}
Or you can use Generics like so :
void Round<T>(T first, T second,...)
{
// Create the list of the type
new List<T>();
Or you can use :
Array.CreateInstance(first.GetType(), length);
In the worse case, you can use first.GetType() and use reflection to create an array.
But it's a bit more complicated