@Foreach how to select top 1

Question

User982203039 posted

I am getting data from a Stored Procedure. I am update a table for Birthdays for the next 7 days. My question in in my view I am wanting to display a header from the Database filed (BDate) of the date of the birthday. My question is how can I use the @Foreach and select top 1 to only display the date 1 time?

Controller:

public ActionResult CustomerBirthdays()
{
	var Div = @Session["Div"];
	List<Birthdays> birthdaylist = new List<Birthdays>();
	string CS = ConfigurationManager.ConnectionStrings["yyy"].ConnectionString;
	using (SqlConnection con = new SqlConnection(CS))
	{
		SqlCommand cmd = new SqlCommand("GetBirthdaySP", con);
		cmd.CommandType = CommandType.StoredProcedure;
		cmd.Parameters.Add("@Div", SqlDbType.VarChar).Value = Div;
		con.Open();
		SqlDataReader rdr = cmd.ExecuteReader();
		while (rdr.Read())
		{
			Birthdays bd = new Birthdays();
			bd.ID = Convert.ToInt32(rdr["ID"]);
			bd.DivName = rdr["DivName"].ToString();
			bd.BDate = rdr["Bdate"].ToString();
			birthdaylist.Add(bd);
		}
	}
	return View(birthdaylist);

View:

<tr>
	@foreach (Birthdays bd in Model)
	{
		<th style="width:900px">@bd.BDate</th>
	}
</tr>

Answer 1

User303363814 posted

<tr>
   <th style="width:900px">@bd.First().BDate</th>
</tr>

Answer 2

User1686398519 posted

Hi Baze72,

You can use the Take() method to extract the first n elements from the beginning of the target sequence (where n is the method parameter).

@foreach (Birthdays bd in Model.Take(1))
{
    <th style="width:900px">@bd.BDate</th>
}

Best Regards,

YihuiSun

Answer 3

User982203039 posted

<tr>
   <th style="width:900px">@bd.First().BDate</th>
</tr>

I get this:

 CS1061: 'Birthdays' does not contain a definition for 'First' and no extension method 'First' accepting a first argument of type 'Birthdays' could be found (are you missing a using directive or an assembly reference?)

Answer 4

User982203039 posted

YihuiSun

Hi Baze72,

You can use the Take() method to extract the first n elements from the beginning of the target sequence (where n is the method parameter).

@foreach (Birthdays bd in Model.Take(1))
{
    <th style="width:900px">@bd.BDate</th>
}

Best Regards,

YihuiSun

I get :

System.Collections.Generic.List<PBTIntranet.Models.Birthdays>' does not contain a definition for 'Take'

Here is my controller, this might help:

{
	SqlCommand cmd = new SqlCommand("BirthdaySP", con);
	cmd.CommandType = CommandType.StoredProcedure;
	cmd.Parameters.Add("@Div", SqlDbType.VarChar).Value = div;
	con.Open();
	SqlDataReader rdr = cmd.ExecuteReader();
	while (rdr.Read())
	{
		Birthdays bd = new Birthdays();
		bd.ID = Convert.ToInt32(rdr["ID"]);
		bd.Customer = rdr["Customer"].ToString();
		bd.Day = Convert.ToInt32(rdr["Day"]);
		bd.BDate = rdr["Bdate"].ToString();
		birthdaylist.Add(bd);
}

Answer 5

User-183185495 posted

You should really be doing this in the sql using the Top command think how long it will take to process during a for loop with that added burden

SELECT TOP number|percent column_name(s)
FROM table_name
WHERE condition;

https://www.w3schools.com/sql/sql_top.asp

I am getting data from a Stored Procedure. I am update a table for Birthdays for the next 7 days. My question in in my view I am wanting to display a header from the Database filed (BDate) of the date of the birthday. My question is how can I use the @Foreach and select top 1 to only display the date 1 time?

Controller:

public ActionResult CustomerBirthdays()
{
	var Div = @Session["Div"];
	List<Birthdays> birthdaylist = new List<Birthdays>();
	string CS = ConfigurationManager.ConnectionStrings["yyy"].ConnectionString;
	using (SqlConnection con = new SqlConnection(CS))
	{
		SqlCommand cmd = new SqlCommand("GetBirthdaySP", con);
		cmd.CommandType = CommandType.StoredProcedure;
		cmd.Parameters.Add("@Div", SqlDbType.VarChar).Value = Div;
		con.Open();
		SqlDataReader rdr = cmd.ExecuteReader();
		while (rdr.Read())
		{
			Birthdays bd = new Birthdays();
			bd.ID = Convert.ToInt32(rdr["ID"]);
			bd.DivName = rdr["DivName"].ToString();
			bd.BDate = rdr["Bdate"].ToString();
			birthdaylist.Add(bd);
		}
	}
	return View(birthdaylist);

View:

<tr>
	@foreach (Birthdays bd in Model)
	{
		<th style="width:900px">@bd.BDate</th>
	}
</tr>

Answer 6

User1686398519 posted

Hi Baze72,

Did you get this error when using Take() on the view?I did not reproduce your problem.You can refer to the complete example I gave below.

• Only the modified code is given in the example.

Note: If you use Take() in the controller and this error occurs, you need to check whether you add "using System.Linq;"

View

@model IEnumerable<WebApplication26.Models.Birthdays>
@using WebApplication26.Models
<table>
     <tr>
        @foreach (Birthdays bd in Model.Take(1))
         {
           <th style="width:900px">@bd.BDate</th>
         }
     </tr>
</table>

Here is the result.

Best Regards,

YihuiSun