SQL UPDATE删除记录

Question

For some reason UPDATE is deleting the record in my SQL Server database instead of updating it. I have tried only passing one variable (and changed it different individual fields) and it deletes 100%. I also have made sure there was data being passed so I'm not dealing with a DBNull issue. My SO and google searches keep coming up with the delete then add row process for updating records. What might be going on here?

protected void grdvMyEntries_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    string Task = (grdvMyEntries.Rows[e.RowIndex].FindControl("ddlTasks") as DropDownList).SelectedItem.Value;

    string Code = (grdvMyEntries.Rows[e.RowIndex].FindControl("ddlPayrollCodes") as DropDownList).SelectedItem.Value;
    DateTime strDate = Convert.ToDateTime((grdvMyEntries.Rows[e.RowIndex].FindControl("txtDateEdit") as TextBox).Text.Trim());
    string TimeIn = (grdvMyEntries.Rows[e.RowIndex].FindControl("txtTimeInEdit") as TextBox).Text.Trim();
    string TimeOut = (grdvMyEntries.Rows[e.RowIndex].FindControl("txtTimeOutEdit") as TextBox).Text.Trim();
    string ItemNo = (grdvMyEntries.Rows[e.RowIndex].FindControl("txtItemNo") as TextBox).Text.Trim();
    string WO = (grdvMyEntries.Rows[e.RowIndex].FindControl("txtWO") as TextBox).Text.Trim();
    string WIP = (grdvMyEntries.Rows[e.RowIndex].FindControl("txtWIP") as TextBox).Text.Trim();
    string Note = (grdvMyEntries.Rows[e.RowIndex].FindControl("txtNote") as TextBox).Text.Trim();
    string TimeID = grdvMyEntries.DataKeys[e.RowIndex].Value.ToString();
    string strConnString = ConfigurationManager.ConnectionStrings["MAFapp"].ConnectionString;

    string strTmp = "Date:" + strDate + "|TimeIn:" + TimeIn + "|TimeOut:" + TimeOut + "|WIP:" + WIP + "|WO:" + WO + "|ItemNo:" + ItemNo + "|Task:" + Task + "|Code:" + Code + "|Note:" + Note + "|WHERE TimeID:" + TimeID;
    Debug.Print(strTmp);

    using (SqlConnection con = new SqlConnection(strConnString))
    {
        string query = "UPDATE Time SET [Date]=@Date, [TimeIn]=@TimeIn, [TimeOut]=@TimeOut, [WIP]=@WIP, [WO]=@WO, [ItemNo]=@ItemNo, [Task]=@Task, [Code]=@Code, [Note]=@Note WHERE [TimeID]=@TimeID";
        Debug.WriteLine(query);
        using (SqlCommand cmd = new SqlCommand(query))
        {
            cmd.Connection = con;
            cmd.Parameters.AddWithValue("@TimeID", TimeID);
            cmd.Parameters.AddWithValue("@Date", strDate);
            cmd.Parameters.AddWithValue("@TimeIn", TimeIn);
            cmd.Parameters.AddWithValue("@TimeOut", TimeOut);
            if (String.IsNullOrWhiteSpace(WIP.Trim()))
            {
                cmd.Parameters.AddWithValue("@WIP", WIP).Value = Convert.DBNull; ;
            }
            else
            {
                cmd.Parameters.AddWithValue("@WIP", WIP);
            }
            if (String.IsNullOrWhiteSpace(WO.Trim()))
            {
                cmd.Parameters.AddWithValue("@WO", WO).Value = Convert.DBNull; ;
            }
            else
            {
                cmd.Parameters.AddWithValue("@WO", WO);
            }
            if (String.IsNullOrWhiteSpace(ItemNo.Trim()))
            {
                cmd.Parameters.AddWithValue("@ItemNo", ItemNo).Value = Convert.DBNull; ;
            }
            else
            {
                cmd.Parameters.AddWithValue("@ItemNo", ItemNo);
            }
            if (String.IsNullOrWhiteSpace(Task.Trim()))
            {
                cmd.Parameters.AddWithValue("@Task", Task).Value = Convert.DBNull; ;
            }
            else
            {
                cmd.Parameters.AddWithValue("@Task", Task);
            }
            cmd.Parameters.AddWithValue("@Code", Code);

            if (String.IsNullOrWhiteSpace(Note.Trim()))
            {
                cmd.Parameters.AddWithValue("@Note", Note).Value = Convert.DBNull; ;
            }
            else
            {
                cmd.Parameters.AddWithValue("@Note", Note);
            }


            con.Open();
            cmd.ExecuteNonQuery();
            con.Close();
            tblSummary.DataBind();
            grdvMyEntries.DataBind();
        }
    }
}

Answer 1

Update won't delete rows from a table. The only possibility would be trigger on your tables. Please run this query to find list of triggers and its text.

USE ChangeThisToDatabaseName
GO

SELECT so.NAME
    ,TEXT
FROM sysobjects so
    ,syscomments sc
WHERE type = 'TR'
    AND so.id = sc.id
    AND TEXT LIKE '%Time%'

Note:If there is no triggers on your table then please ensure Is there any records exist based on your filter before running the update.

Answer 2

A while ago, when I try to instert data to a table, data is being recorded but after two seconds from insterting the record was deleted automatically. There was no trigger or something like that. Then I have observed the table and I found an indexing problem. I have rebuilt that index and problem has been solved. If you do not have huge data in your table I suggest you to try to rebuild your indexes or recreate them.