如何将数据表中的最后一行数据获取到字符串

Question

我需要显示我进入数据表的最后一行，但我总是将第一行显示在这一行中。让我们假设这是调试时可以看到的图像，它有2列5行，我需要获得第二行第5列

Answer 1

Just change your query to

"select top 1 id,name from demo where id='" + id + "' order by id desc;

You should create an sqlParameter for the id by the way...

To be honest I don't even see the point on using a datatable for this.

You should change your code to something like this:

    using (SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["ReferenceToYourConnectionString"].ToString()))
    {
        cn.Open();
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = cn;
        cmd.CommandType = CommandType.Text;
        cmd.Parameters.Add("@Id", SqlDbType.Int).Value = int.Parse(ViewState["id"].ToString()); //Whatever your id columntype is
        cmd.CommandText = "SELECT TOP 1 id,name FROM demo WHERE id = @id ORDER BY id, name DESC";
        SqlDataReader dr = cmd.ExecuteReader();
        while (dr.Read())
        {
             CKEditor1.Text = dr["name"].ToString()
        }
    }

Answer 2

更改代码以引用数据表的最后一行

string text = dt.Rows[dt.Rows.Count-1][1].ToString();