使用c＃中的下一个按钮 [英] using next button in c#

问题描述

protected void Page_Load(object sender, EventArgs e)
    {
                con = new SqlConnection();
        con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True";
        con.Open();

        ds = new DataSet();
        string sql = "SELECT * FROM Internet";
        da = new SqlDataAdapter(sql, con);
        da.Fill(ds, "Internet");
        Maxrows = ds.Tables["Internet"].Rows.Count;

        Label2.Text = inc.ToString();
        Label3.Text = Maxrows.ToString(); // displays the number of rows
       Records();
        con.Close();
    }

    private void Records()
    {
        drow = ds.Tables["Internet"].Rows[inc];
        Label1.Text = drow.ItemArray.GetValue(1).ToString();
        inc++;

    }


protected void Button1_Click(object sender, EventArgs e)
    {
if (inc <= Maxrows )
        {

            Records();
            Label2.Text = inc.ToString(); // outputs the row number which is being displayed
        }
    }
}

I have this above code and I am trying to display a number of records from a database on a web application. when I first load the page it load the first record. I click the next button and displays the second button. I have 3 records but the 3rd record never displays why? please can anyone help?

推荐答案

正如你所说，有3条记录，那么inc应该从0到2不等。

&条件if（inc <= Maxrows）应为if（inc
请调试代码并检查值是什么。

As you said there are 3 records then inc should vary from 0 to 2.
& Condition if (inc <= Maxrows ) should be if (inc < Maxrows ).
Please debug you code & check what r the values.

这篇关于使用c＃中的下一个按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！