Error converting nvarchar to numeric

Question

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when i try insert , it does not work

What I have tried:

C#

try
        {
            string str = "insert into LoanMaster( custId, principal,LoanTerm,LoanInterest,LoanMaturedAmt,LoanRate, Loanloantype, Loanmonthlyp) ";
            str += " values (@custId, @principal,@LoanInterest,@LoanMaturedAmt,@LoanRate,@Loanloantype,@Loanmonthlyp,@LoanTerm)";

            SqlCommand insert = new SqlCommand(str, myConn);


            insert.Parameters.AddWithValue("@custId", LblCustId.Text);
            insert.Parameters.AddWithValue("@principal", double.Parse(TbPrincipal.Text));
            insert.Parameters.AddWithValue("@LoanTerm", int.Parse(DdlTerm.SelectedItem.Text));

            insert.Parameters.AddWithValue("@LoanMaturedAmt", double.Parse(LblMaturedAmt.Text));
            insert.Parameters.AddWithValue("@LoanRate", double.Parse(LblIntRte.Text));
            insert.Parameters.AddWithValue("@LoanInterest", double.Parse(LblInterest.Text));
            insert.Parameters.AddWithValue("@Loanloantype", DDlLoanType.SelectedItem.Text);
            insert.Parameters.AddWithValue("@Loanmonthlyp", double.Parse(LblMthlyP.Text));
            myConn.Open();
            int insertcount = insert.ExecuteNonQuery();
            Response.Write("<script>alert('Successfully applied');</script>");

Posted 28-Jul-16 3:13am

Member 12652110

Updated 28-Jul-16 3:40am

Karthik_Mahalingam

v2

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Comments

Karthik_Mahalingam 28-Jul-16 9:27am

what are the column Types in table ?

the column name and values are not in sync,
tring str = "insert into LoanMaster( custId, principal,LoanTerm,LoanInterest,LoanMaturedAmt,LoanRate, Loanloantype, Loanmonthlyp) ";
str += " values (@custId, @principal,@LoanInterest,@LoanMaturedAmt,@LoanRate,@Loanloantype,@Loanmonthlyp,@LoanTerm)";

Kornfeld Eliyahu Peter 28-Jul-16 9:30am

Not everything NVARCHAR can hold can be converted to numeric! Use your debugger to see what the actual value is!!!

Member 12652110 28-Jul-16 9:35am

thank you

Member 12652110 28-Jul-16 9:35am

it works perfectly

3 solutions

Solution 1

The error is pretty simple. It is coming from SQL, not from C#. This means you are trying to store something that is not a number into a numeric field. This is very, very easy for you to fix on your own and we cannot help you all the way because we cannot see your database nor run your code.

Just use the debugger and verify the values you are sending to SQL. Then you also check your SQL to make sure you are putting the correct parameters into the correct fields.

Very simple.

Posted 28-Jul-16 3:34am

ZurdoDev

Solution 2

C#

Hi Karthik

You can do one things,Try to put validation before insertion ...(SqlDbType.Decimal)

insert.Parameters.AddWithValue("@Loanloantype", Decimal.Parse(DDlLoanType.SelectedItem.Text));

Note : if it not work please share details with me .

Posted 28-Jul-16 3:38am

mauryasantosh

Updated 28-Jul-16 3:40am

v2

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Karthik_Mahalingam · Accepted Answer · 2016-07-28T03:40:00

Quote:
string str = "insert into LoanMaster( custId, principal,LoanTerm,LoanInterest,LoanMaturedAmt,LoanRate, Loanloantype, Loanmonthlyp) ";
str += " values (@custId, @principal,@LoanInterest,@LoanMaturedAmt,@LoanRate,@Loanloantype,@Loanmonthlyp,@LoanTerm)";

int the insert statement, you are passing @Loadloantype value to LoanRate column
where @Loadloantype holds the string value and LoadRate is of type decimal

use this

C#

string str = "insert into LoanMaster( custId, principal,LoanTerm,LoanInterest,LoanMaturedAmt,LoanRate, Loanloantype, Loanmonthlyp) ";
                             str += " values (@custId, @principal,@LoanTerm,@LoanInterest,@LoanMaturedAmt,@LoanRate,@Loanloantype,@Loanmonthlyp)";