how to get the next autoincrement value in sql using c# code

Question

0.00/5 (No votes)

See more:

C#

int ScriptId = 0;

     string sql = "Select Max(ScriptId) as ScriptId from tbl_Script";
SqlCommand cmd = new SqlCommand(sql, connection);
                SqlDataReader reader = cmd.ExecuteReader();
                reader.Read();

if (reader.HasRows)
                {
                    while (reader.Read())
                    {


                        if (reader["ScriptId"] == System.DBNull.Value)
                        {

                            ScriptId = 1;
                        }
                        else
                        {
                            ScriptId = ScriptId++;
                        }
                    }
                }

Hi All
I am creating a winform application in c#.and using sql database.
I have one table, tbl_Script, which has columns like tblScript_Id, and ScriptId. tblScript_Id is auto increment and all other datatypes are Integer .
I want store the value in var ScriptId. but if i am get null value want to store 1 or if get 1 want to store in var 2.
But I am get error in the line

C#

if (reader["ScriptId"] == System.DBNull.Value)

IndexOutOfRangeException was Unhandaled pla help

Posted 14-Feb-14 19:17pm

Arjunwalmiki

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Abhinav S · Accepted Answer · 2014-02-14T19:28:00

Solution 1

Try reader[0] instead of ScriptId.

Posted 14-Feb-14 19:28pm

Abhinav S

Comments

Arjunwalmiki 15-Feb-14 2:21am

int ScriptId = 0;

string sql = "Select Max(ScriptId) as ScriptId from tbl_Script";
SqlCommand cmd = new SqlCommand(sql, connection);
SqlDataReader reader = cmd.ExecuteReader();
reader.Read();

if (reader[0] == System.DBNull.Value)
{

ScriptId = 1;
}
else
{
int i = Convert.ToInt32(reader["ScriptId"].ToString());
ScriptId = (i + 1);
}

}

thank you abhinav my problem was solve i have done change as you told me my correct code is look like this but dude if i am recived null value from table i want to set one

if (reader["ScriptId"] == System.DBNull.Value)
{

ScriptId = 1;// is this right or ?
}