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POHow to compare system date with date existing in database table
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2013-02-08T04:23:20.743
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<h2>I have 2 columns in my table TimeTable</h2> <ol> <li><code>start_date</code> (format is <code>DD-MM-YYYY</code>)</li> <li><code>end_date</code></li> </ol> <p>If I log in from my login page, I want to check that current date is between <code>start_date</code> and <code>end_date</code>; if so, I am able to log in.</p> <p>How to do comparison in C#..asp.net..?</p> <p>I have printed current date in login page successfully.</p> <pre><code>lblMsg.Text= DateTime.Now.ToString("dd-MM-yyyy"); </code></pre> <p>I am using asp.net with c#</p> <pre><code> start_date end_date 8/2/2013 12:00:00 AM 10/2/2013 12:00:00 AM </code></pre> <h2>Code for Storing Date in DD/MM/YYYY format</h2> <p>CultureInfo provider = CultureInfo.InvariantCulture;</p> <pre><code> DateTime startdate = DateTime.ParseExact(tbstartdate.Text.ToString().Trim(), "dd/MM/yyyy", provider); DateTime enddate = DateTime.ParseExact(tbenddate.Text.ToString().Trim(),"dd/MM/yyyy",provider); string sql = "INSERT INTO TimeTable(start_date,end_date)" + "VALUES (@startdate,@enddate)"; SqlConnection conn = new SqlConnection(ConnectionString); conn.Open(); SqlCommand cmd = new SqlCommand(sql, conn); cmd.Parameters.Add("@startdate", SqlDbType.DateTime).Value = startdate; cmd.Parameters.Add("@enddate", SqlDbType.DateTime).Value = enddate; cmd.Prepare(); n = cmd.ExecuteNonQuery(); conn.Close(); </code></pre> <h2>Code for Checking Date on login page</h2> <p>CultureInfo provider = CultureInfo.InvariantCulture;</p> <pre><code> DateTime date = DateTime.ParseExact(DateTime.Now.ToString("dd/mm/yyyy"), "dd/MM/yyyy", provider); // DateTime date=DateTime.Now.ToString("dd/mm/yyyy"); string query1 = "select * from TimeTable where ((start_date >= @date1 and End_date<= @date2) and UserType=@type)"; SqlConnection conn = new SqlConnection(ConnectionString); conn.Open(); SqlCommand com = new SqlCommand(query1, conn); com.Parameters.Add("@type",dpusertype.SelectedItem.Text.ToString()); com.Parameters.Add("@date1",date); com.Parameters.Add("@date2", date); com.CommandType = CommandType.Text; SqlDataAdapter da = new SqlDataAdapter(com); DataTable dt = new DataTable(); da.Fill(dt); </code></pre> <p>`if (dt.Rows.Count > 0) // comparing users from table </p> <pre><code> { FormsAuthentication.RedirectFromLoginPage(txtFcode.Text, Persist.Checked); Response.Redirect("~/DeptCoordinator/DeptCoordinator_homepage.aspx"); } </code></pre> <h2>Getting Error</h2> <p>The DateTime represented by the string is not supported in calendar System.Globalization.GregorianCalendar. Desc`</p>
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<c#><asp.net><sql-server>
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How to compare system date with date existing in database table
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.