如何从SQL Server获取ado.net中的数字数据类型的值

Question

I am writing application with ADO.NET and want to select a value which is of type numeric(9, 2) . But I don't know how to use this value, I mean I'm not able to cast this value.

So to which datatype it should be casted to.

Decimal decimalLastModifiedWaitingForApprovalcurrency = 0;
decimalLastModifiedWaitingForApprovalcurrency = (Decimal)(cmd.ExecuteScalar());

I have tried this also

Convert.ToDecimal(cmd.ExecuteScalar());

I have considerred that this could be casted to Decimal , But its giving error.

So whats numeric equivalent of SQL server numeric datatype in C#?

Answer 1

Since you are using ExecuteScalar() , it is returning the value as object . If you aren't quite sure what CLI type it has chosen, just look at:

object value = cmd.ExecuteScalar();
Debug.WriteLine(value.GetType().Name);

Answer 2

Decimal only. You are using correct data type.

Check the complete list SQL Server Data Type Mappings

Answer 3

try Convert.ToDouble(cmd.ExecuteScalar()); and let me know if this does not work.