How to convert string to float in C#

Question

1.33/5 (2 votes)

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How to convert these string str=1.2222222222 to float

I tried float.parse(str);

but i did n't get any result

I have taken Stored Procedure and written code like this

C#

if (cn.State != ConnectionState.Open)
                 cn.Open();
             cmd = new SqlCommand("SP_Exchange_Rate_Update", cn);
             cmd.CommandType = CommandType.StoredProcedure;
             cmd.Parameters.AddWithValue("@SHORT_NAME", Txt_Currency.Text);
             cmd.Parameters.AddWithValue("@CURRENCY", Txt_Desc.Text);
             cmd.Parameters.AddWithValue("@EXCHANGE_RATE",Convert.ToDouble(Txt_Rate.Text));
             cmd.ExecuteNonQuery();
             cn.Close();
             loaddata();
             LoadCurrency();
             Txt_Currency.ReadOnly = true;

At @EXCHANGE RATE I have taken float.
While I was running I got the result upto two decimal points I got approximate value.

For Example Txt_Rate.Text=1.225222222 I have given I got the result 1.23
Can u pls solve this error

Posted 18-Sep-14 23:27pm

TarunKumarSusarapu

Updated 19-Sep-14 0:12am

v2

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3 solutions

Solution 3

C#

string str = "3.14159";
float fnum = float.Parse(str);

Posted 19-Sep-14 1:27am

Shemeemsha (ഷെമീംഷ)

Comments

Hussainp 19-Sep-14 11:59am

Yes...yes,.it is working

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sankarsan parida · Accepted Answer · 2014-09-18T23:29:00

Solution 1

See the following code

string str = "1.225222222";
decimal value = 0;
decimal.TryParse(str, out value);
value = Math.Round(value, 2);

Posted 18-Sep-14 23:29pm

sankarsan parida

Updated 19-Sep-14 0:22am

v2

Comments

TarunKumarSusarapu 19-Sep-14 5:36am

I want to write this in windows not console

[no name] 19-Sep-14 5:40am

Simple so don't write the last line use direct value :)

TarunKumarSusarapu 19-Sep-14 6:04am

I tried but i didn't get that accurate result

[no name] 19-Sep-14 6:05am

what accurate and which is missing can u show us

TarunKumarSusarapu 19-Sep-14 6:16am

I have Improved My Question did u see that

[no name] 19-Sep-14 6:22am

see my solution it's updated

TarunKumarSusarapu 19-Sep-14 6:25am

What is 2 in the Math.Round() method

TarunKumarSusarapu 19-Sep-14 6:30am

I got the result in front end but it did n't convert at the backend. In Backend I have taken Exchange rate as float

[no name] 19-Sep-14 7:06am

Good job

TarunKumarSusarapu 19-Sep-14 7:11am

Thanks What is the solution I am asking. can u pls solve it

[no name] 19-Sep-14 7:29am

If you want rownd your decimal value then it must be decimal or double

TarunKumarSusarapu 19-Sep-14 7:32am

K I got it I used Convert.Todouble() method Thanks For ur valuable suggestions

[no name] 19-Sep-14 8:12am

good

Animesh Datta · Accepted Answer · 2014-09-19T00:32:00

Solution 2

Hello ,
Try this way

string str = "1.225222222";
string value= Math.Round(Convert.ToDouble(str), 2).ToString();

now pass this value in your code as exchange rate
thanks

Posted 19-Sep-14 0:32am

Animesh Datta

Comments

TarunKumarSusarapu 19-Sep-14 6:37am

I tried but I have taken Exchangerate datatype as float.

When I pass value in the front end 1.25555555

then it takes same value at the backend 1.26

Animesh Datta 19-Sep-14 6:44am

then what is the issue now ?and what you exactly want from the above?

TarunKumarSusarapu 19-Sep-14 7:06am

yes I want accurate value

TarunKumarSusarapu 19-Sep-14 7:32am

K I got it I used Convert.Todouble() method Thanks For ur valuable suggestions

Animesh Datta 19-Sep-14 7:33am

glad to help you . please accept the solution if it works