wants to Update All rows from Database

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SQL-Server-2005

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This code is run properly ..but only first row is updating from database i want to update all the rows from database while page load..Please help me sir ,Thanks in Advance :)

C#

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Binddays();
        }
    }


public void Binddays()
    {

        con.Open();

        OleDbDataAdapter da = new OleDbDataAdapter("Select * from SlideShowTable", con);
        DataTable dt = new DataTable();
        da.Fill(dt);
        if (dt.Rows.Count > 0)
        {
            Stratd = dt.Rows[0][11].ToString();
            Endd = dt.Rows[0][12].ToString();
            int Totaldays = duration(Stratd, Endd);
            int Totaldayss = durationn(System.DateTime.Now.ToString("MM/dd/yyyy"), Endd);

            string str = Convert.ToString(Totaldays);
            string str1 = Convert.ToString(Totaldayss);


            OleDbCommand cmd123 = new OleDbCommand("UPDATE SlideShowTable SET Total_Days='" + str + "',Days_remain='" + str1 + "'", con);

            cmd123.ExecuteNonQuery();



        }
    }
    public int duration(string startdate, string enddate)
    {
        DateTime dt1 = DateTime.Parse(Convert.ToDateTime(Stratd).ToString("MM/dd/yyyy"));
        DateTime dt2 = DateTime.Parse(Convert.ToDateTime(Endd).ToString("MM/dd/yyyy"));
        TimeSpan ts = dt2.Subtract(dt1);
        int days = ts.Days;
        return days;
    }
    public int durationn(string startdate, string enddate)
    {
        DateTime dtt1 = DateTime.Parse(System.DateTime.Now.ToString("MM/dd/yyyy"));
        DateTime dtt2 = DateTime.Parse(Convert.ToDateTime(Endd).ToString("MM/dd/yyyy"));
        TimeSpan tss = dtt2.Subtract(dtt1);
        int dayss = tss.Days;
        return dayss;
    }

Posted 25-Apr-13 1:28am

Amirsalgar1

Updated 25-Apr-13 1:32am

StianSandberg

v2

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Comments

PRAKASH9 25-Apr-13 7:37am

use the for loop for update all rows from database

like

for(int i=0;i<dt.rows.count;i++)
{}

Amirsalgar1 25-Apr-13 7:40am

thanks sir .. please suggest how it will come

Amirsalgar1 25-Apr-13 7:46am

Sir,i have tried your for loop but still same thing is happening

SIJUTHOMASP 25-Apr-13 7:42am

Please try to execute your update statement directly in SQL Management studio and see if it is updating all records?

Updating first row only happening when it is used in the application?

Amirsalgar1 25-Apr-13 7:44am

ya it is updating ..only first row :(

SIJUTHOMASP 25-Apr-13 7:47am

Are you saying that, the update statement directly executed in SQL server and still it was updating first row right?
Update with out a where condition should update all those rows. If that is happening in your direct execution as well, is there any other program trying to update the same table parallel?

Amirsalgar1 25-Apr-13 7:48am

sir , will u suggest me, for loop for this ..

Amirsalgar1 25-Apr-13 7:49am

ok , trying
no, only one table is there..in access

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Chetan Tembhre · Answer 1 · 2013-04-25T01:54:00

Please use "for" loop for this. Refer below code-

C#

if (dt.Rows.Count > 0)
       {
         for (i=0; i<=dt.Rows.Count;i++)
          {
               Stratd = dt.Rows[i][11].ToString();
               Endd = dt.Rows[i][12].ToString();
               int Totaldays = duration(Stratd, Endd);
               int Totaldayss = durationn(System.DateTime.Now.ToString("MM/dd/yyyy"), Endd);
               string str = Convert.ToString(Totaldays);
               string str1 = Convert.ToString(Totaldayss);
               OleDbCommand cmd123 = new OleDbCommand("UPDATE SlideShowTable SET Total_Days='" + str + "',Days_remain='" + str1 + "'", con);
               cmd123.ExecuteNonQuery();
           }
       }

Sumit Authankar · Answer 2 · 2013-04-25T02:04:00

int iRowCount = dt.Rows.Count;
string strPK;                             // string to store Primary Key
if ( iRowCount > 0)
{
      for(int intI=0; intI< iRowCount;intI++)
      {
           Stratd = dt.Rows[intI][11].ToString();
           Endd = dt.Rows[intI][12].ToString();
           strPK= dt.Rows[intI][x].ToString();  // where x is the Primary key column no.
           int Totaldays = duration(Stratd, Endd);
           int Totaldayss = durationn(System.DateTime.Now.ToString("MM/dd/yyyy"), Endd);
 
           string str = Convert.ToString(Totaldays);
           string str1 = Convert.ToString(Totaldayss);
 
 // replace your query with Update SlideShowTable SET Total_Days='" + str + "',Days_remain='" + str1 + "' WHERE Primary_Key='"+ strPK + "'" 
           OleDbCommand cmd123 = new OleDbCommand("UPDATE SlideShowTable SET Total_Days='" + str + "',Days_remain='" + str1 + "'" , con);
 
            cmd123.ExecuteNonQuery();
            }
        }

Hope this helps :)

wants to Update All rows from Database

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