Repeater自定义分页 + 排序 + 全选删除

后台代码:

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

public partial class RepeaterPagingSortingDelete : System.Web.UI.Page
{
//每页显示的最多记录的条数
private int pageSize = 10;
//当前页号
private int currentPageNumber;
//排序表达式
private string sortExpression = string.Empty;
//排序方向
private string sortDirection = string.Empty;
//显示数据的总条数
private static int rowCount;
//总页数
private static int pageCount;

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("GetProductsCount", cn);
cmd.CommandType = CommandType.StoredProcedure;
cn.Open();
rowCount = (int)cmd.ExecuteScalar();
cn.Close();
pageCount = (rowCount - 1) / pageSize + 1;
currentPageNumber = 1;
for (int i = 1; i <= pageCount; i++)
{
dropPage.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
Query();
}
sortExpression = ViewState["sortExpression"].ToString();
sortDirection = ViewState["sortDirection"].ToString();
currentPageNumber = Convert.ToInt32(ViewState["currentPageNumber"]);
}

private void Query()
{
SetButton(currentPageNumber);
SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("GetProductsByPage", cn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@sortExpression", sortExpression + " " + sortDirection);
cmd.Parameters.AddWithValue("@pageNumber", currentPageNumber);
cmd.Parameters.AddWithValue("@pageSize", pageSize);
cn.Open();
rptProducts.DataSource = cmd.ExecuteReader();
rptProducts.DataBind();
cn.Close();
lblMessage.Text = "共找到" + rowCount + "条记录, 当前第" + currentPageNumber + "/" + pageCount + "页";
Save();
}

protected void lbtnPage_Command(object sender, CommandEventArgs e)
{
switch (e.CommandName)
{
case "First":
currentPageNumber = 1;
break;
case "Previous":
currentPageNumber = (int)ViewState["currentPageNumber"] - 1 > 1 ? (int)ViewState["currentPageNumber"] - 1 : 1;
break;
case "Next":
currentPageNumber = (int)ViewState["currentPageNumber"] + 1 < pageCount ? (int)ViewState["currentPageNumber"] + 1 : pageCount;
break;
case "Last":
currentPageNumber = pageCount;
break;
}
dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
Query();
}

protected void lbtnSort_Command(object sender, CommandEventArgs e)
{
if (e.CommandName != ViewState["sortExpression"].ToString())
{
sortDirection = "ASC";
}
else
{
if (sortDirection == "ASC")
{
sortDirection = "DESC";
}
else if (sortDirection == "DESC" || sortDirection == string.Empty)
{
sortDirection = "ASC";
}
}
sortExpression = e.CommandName;
Query();
}

protected void dropPage_SelectedIndexChanged(object sender, EventArgs e)
{
currentPageNumber = int.Parse(dropPage.SelectedValue);
Query();
}

private void SetButton(int currentPageNumber)
{
lbtnFirst.Enabled = currentPageNumber != 1;
lbtnPrevious.Enabled = currentPageNumber != 1;
lbtnNext.Enabled = currentPageNumber != pageCount;
lbtnLast.Enabled = currentPageNumber != pageCount;
}

private void Save()
{
ViewState["currentPageNumber"] = currentPageNumber;
ViewState["sortExpression"] = sortExpression;
ViewState["sortDirection"] = sortDirection;
}

protected void rptProducts_ItemCreated(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Header)
{
if (!string.IsNullOrEmpty(sortDirection))
{
Label lblSort = new Label();
lblSort.EnableTheming = false;
lblSort.Font.Name = "webdings";
lblSort.Font.Size = FontUnit.Small;
lblSort.Text = sortDirection == "ASC" ? "5" : "6";
(e.Item.FindControl("td" + sortExpression) as HtmlTableCell).Controls.Add(lblSort);
}
}
}
protected void btnDelete_Click(object sender, EventArgs e)
{
CheckBox chkSelect;
Label lblProductID;
foreach (RepeaterItem item in rptProducts.Items)
{
chkSelect = item.FindControl("chkSelect") as CheckBox;
if (chkSelect != null && chkSelect.Checked)
{
lblProductID = item.FindControl("lblProductID") as Label;
//Response.Write(lblProductID.Text);
//可以在这里完成删除逻辑
}
}
}

protected void rptProducts_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Header)
{
CheckBox chkAll = e.Item.FindControl("chkAll") as CheckBox;
chkAll.Attributes.Add("onclick", "chooseAll('" + chkAll.ClientID + "')");
}

if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
CheckBox chkSelect = e.Item.FindControl("chkSelect") as CheckBox;
chkSelect.Attributes.Add("onclick", "highLightSelected(this);");
}
}
}