how to convert decimal value into int in c# [closed] - c#

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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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C# Get Object Values [closed]

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I'm new to C#.
I have a method that returns an object with the List of objects inside.
0 {{DapperRow, RecordedFormID = 'id1'}} object {Dapper.SqlMapper.DapperRow}
1 {{DapperRow, RecordedFormID = 'id2'}} object {Dapper.SqlMapper.DapperRow}
How can I get those ids as strings?
Here is a screenshot

You can use System.Linq namespace and do this:
yourObject.Select(x => x.RecordedFormID);

How can i generate unique number as format XXXX-XXXX-XXXX using c# [closed]

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I want to generate number as format above and I try to use UUID() and GUID() but it is not what I want(difference format and it is hexadecimal not number)
anyone have any idea or logic to do it?

The simplest way to generate 1000000000000 unique numbers is just an ever-increasing sequence:
long i = 42; // whatever
string key = $"{i / 100000000:0000}-{(i / 10000) % 10000:0000}-{i % 10000:0000}";
The next time, increase i before generating the key.

Input string was not in a correct format in gridview [closed]

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I am updating the values in grid view. if i am updating the noofdays it will showing Input string was not in a correct and how to give me some suggestion.
and i have other question when the employee apply leave before week it will take the data else it will show the message.
how to write it logic.
code behind
leaveUpdateRow.NoOfDays = Convert.ToInt32(((TextBox)(row.Cells[4].Controls[0])).Text);
ASPX
<asp:BoundField DataField="NoOfDays" HeaderText="Leave Period"></asp:BoundField>

Try this
leaveUpdateRow.NoOfDays = Convert.ToInt32(((TextBox)(row.Cells[4].Controls[0])).Text) == NULL ? 0 :Convert.ToInt32(((TextBox)(row.Cells[4].Controls[0])).Text);

Try it
please check the value is integer before convert the values.
Use string.IsNullOrEmpty
leaveUpdateRow.NoOfDays=string.IsNullOrEmpty(((TextBox)(row.Cells[4].Controls[0])).Text)?0:Convert.ToInt32(((TextBox)(row.Cells[4].Controls[0])).Text);

How do I format a string? [closed]

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I have a string "5-13-2013"
I want to make it look like "051313"
All three fields (month,day,year) must have 2 digits, if it only has one , I need to add a zero in front
any easy way to do this?

You can convert your datetime to multiple formats like
string date = yourdateTime.ToString("dd/mm/yyyy");
string date = yourdateTime.ToString("dd/mm/yyyy HH:mm");
string date = yourdateTime.ToString("dd/mm/yyyy HH:mm:ss");
string date = yourdateTime.ToString("mmddyy"); // your desired
To know what these mean you need to read here.

How can I reduce the number of figures of a number? [closed]

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Is there a way to reduce the number of figures of a number?
Example:
double d = 222222222222222224444444444444.0
I want to "serialize" it like 17[2]13[4] for example.
The idea is to reduce the number of "chars" used by the number.

double d = 222222222222222224444444444444.0
You can't have a double that big in the first place.
I want to "serialize" it like 17[2]13[4] for example.
The idea is to reduce the number of "chars" used by the number.
A double only takes 8 bytes regardless of its value. There doesn't seem to be any actual point to this.

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