how to simple generate id day by day with system date ?

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code for one day,

int i;
string str;
SqlConnection cn = null;
protected void Page_Load(object sender, EventArgs e)
   {
         cn = new 
     SqlConnection(ConfigurationManager.ConnectionStrings["concms"].ConnectionString);
        cn.Open();
        txtdate.Text = Convert.ToDateTime(date).ToString("dd-MM-yyyy");
        DataTable dt = new DataTable();
        SqlDataAdapter da = new SqlDataAdapter("select max(substring(complainid,10,3))
                  from newcomplainuser where dates ='" + txtdate.Text.ToString()+"'",
                  cn);
        da.Fill(dt);
        str = da.SelectCommand.ExecuteScalar().ToString() ;
        i = Convert.ToInt32(str) + 1 ;
        txtcomplain.Text = Convert.ToDateTime(date).ToString("ddMMyyyy" + "-" + i );
        cn.close();
}

output:
27032012-1
27032012-2
27032012-3........ 27032012-n

now, how can i generate for second day ...??

second day output will be 28032012-1, 28032012-2.. so on..

please tell your suggestion...

Posted 27-Mar-12 1:10am

mitali nashikwala

Updated 27-Mar-12 1:22am

Not Active

v2

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Comments

BobJanova 27-Mar-12 7:18am

I don't understand the question. Passing a different 'date' variable to this code should already do what you ask for.

kishore Rajendran 27-Mar-12 7:26am

pass current date to this code, thats your solution

2 solutions

Solution 2

'BobJanova' and 'kishore Rajendran' already put the right direction.

Though if you want to get the next day, the code snippets would be,
date.AddDays(1);

Posted 27-Mar-12 4:24am

enamur

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Not Active · Accepted Answer · 2012-03-27T01:34:00

Not a direct solution but some tips to improve your skills.

First, NEVER accept unvalidated user input and concatenate a SQL Commmand. EVER. Do some research on SQL Injection attacks and you will understand what bad things will happen. You should be using parameterized queries at a minimum.

Make use of using blocks.

using(SqlConnection conn = new SqlConnection(...))
{
   
}

This makes no sense

txtdate.Text = Convert.ToDateTime(date).ToString("dd-MM-yyyy");

You are converting some string to a date then back to a string only to assign it to a textbox. Then later using that textbox value in the SqlCommand. Use the string directly.

txtdate.Text.ToString()

The text property is already a string. You don't need to use ToString on a string.

Don't put this in the Page_Load event.