nodatasource.aspx.cs

做Web开发大多都要用的GridView,这个讲座可以让你随心所欲的使用GridView

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.Sql;
using System.Data.SqlClient;

public partial class NoDataSource : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            GridViewDataBind();
        }

    }
    public void GridViewDataBind()
    {
        Button1.Enabled = true;
        Button2.Enabled = true;
        SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ToString());
        try
        {
            conn.Open();
            SqlDataAdapter sa = new SqlDataAdapter("select * from customers where 1=2", conn);
            DataSet ds = new DataSet();
            sa.Fill(ds, "customers");
            if (ds.Tables[0].Rows.Count == 0)
            {
                AddDummyData(ds);
            }
            GridView1.DataSource = ds.Tables["customers"];
            GridView1.AllowPaging = true;
            GridView1.PageSize = 5;
            GridView1.DataBind();
            conn.Close();
            if (GridView1.PageIndex == 0)
            {
                Button1.Enabled = false;
            }
            if (GridView1.PageIndex == GridView1.PageCount - 1)
            {
                Button2.Enabled = false;
            }

        }
        catch 
        {

        }
        finally
        {
            conn.Close();
        }
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridViewDataBind();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        GridView1.PageIndex = GridView1.PageIndex - 1;
        GridViewDataBind();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        GridView1.PageIndex = GridView1.PageIndex + 1;
        GridViewDataBind();
    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        GridView1.PageIndex = GridView1.PageCount - 1;
        GridViewDataBind();
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        GridView1.PageIndex = 0;
        GridViewDataBind();
    }
    private void AddDummyData(DataSet ds)
    {

        // Add a dummy row

        DataTable dt = ds.Tables[0];

        DataRow newRow = dt.NewRow();

        dt.Rows.Add(newRow);

    }


}