1、控件代码：
public partial class PagerControl : UserControl { #region 构造函数 public PagerControl() { InitializeComponent(); } #endregion #region 分页字段和属性 private int pageIndex = 1; /// <summary> /// 当前页面 /// </summary> public virtual int PageIndex { get { return pageIndex; } set { pageIndex = value; } } private int pageSize = 1; /// <summary> /// 每页记录数 /// </summary> public virtual int PageSize { get { return pageSize; } set { pageSize = value; } } private int recordCount = 0; /// <summary> /// 总记录数 /// </summary> public virtual int RecordCount { get { return recordCount; } set { recordCount = value; } } private int pageCount = 0; /// <summary> /// 总页数 /// </summary> public int PageCount { get { if (pageSize != 0) { pageCount = GetPageCount(); } return pageCount; } } /// <summary> /// 计算总页数 /// </summary> /// <returns></returns> private int GetPageCount() { if (PageSize == 0) { return 0; } int pageCount = RecordCount / PageSize; if (RecordCount % PageSize == 0) { pageCount = RecordCount / PageSize; } else { pageCount = RecordCount / PageSize + 1; } return pageCount; } #endregion public event EventHandler OnPageChanged; /// <summary> /// 外部调用 /// </summary> public void DrawControl(int count) { recordCount = count; DrawControl(false); } /// <summary> /// 页面控件呈现 /// </summary> private void DrawControl(bool callEvent) { this.GoItem.Text = "跳转"; this.CurrentItem.Text = PageIndex.ToString(); this.TolCountItem.Text = RecordCount.ToString(); this.PageSizeItem.Text = PageSize.ToString(); if (callEvent && OnPageChanged != null) { OnPageChanged(this, null);//当前分页数字改变时，触发委托事件 } SetFormCtrEnabled(); if (PageCount == 1)//有且仅有一页 { this.MoveFirstItem.Enabled = false; this.MovePreviousItem.Enabled = false; this.MoveNextItem.Enabled = false; this.MoveLastItem.Enabled = false; } else if (PageIndex == 1)//第一页 { this.MoveFirstItem.Enabled = false; this.MovePreviousItem.Enabled = false; } else if (PageIndex == PageCount)//最后一页 { this.MoveNextItem.Enabled = false; this.MoveLastItem.Enabled = false; } } /// <summary> /// 设置控件可用性 /// </summary> private void SetFormCtrEnabled() { this.CurrentItem.Enabled = true; this.MoveFirstItem.Enabled = true; this.MovePreviousItem.Enabled = true; this.MoveNextItem.Enabled = true; this.MoveLastItem.Enabled = true; this.GoItem.Enabled = true; } /// <summary> /// 首页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void MoveFirstItem_Click(object sender, EventArgs e) { PageIndex = 1; DrawControl(true); } /// <summary> /// 上一页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void MovePreviousItem_Click(object sender, EventArgs e) { PageIndex = Math.Max(1, PageIndex - 1); DrawControl(true); } /// <summary> /// 下一页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void MoveNextItem_Click(object sender, EventArgs e) { PageIndex = Math.Min(PageCount, PageIndex + 1); DrawControl(true); } /// <summary> /// 末页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void MoveLastItem_Click(object sender, EventArgs e) { PageIndex = PageCount; DrawControl(true); } /// <summary> /// 跳转 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void GoItem_Click(object sender, EventArgs e) { int num = 0; if (int.TryParse(this.CurrentItem.Text.Trim(), out num) && num > 0) { PageIndex = num; DrawControl(true); } } /// <summary> /// 跳转页数限制 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void CurrentItem_TextChanged(object sender, EventArgs e) { int num = 0; if (int.TryParse(this.CurrentItem.Text.Trim(), out num) && num > 0) { if (num > PageCount) { this.CurrentItem.Text = PageCount.ToString(); } } } /// <summary> /// 页数Enter键 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void CurrentItem_KeyPress(object sender, KeyPressEventArgs e) { GoItem_Click(null, null); } private bool isTextChanged = false; /// <summary> /// 页数改变事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void PageSizeItem_TextChanged(object sender, EventArgs e) { int num = 0; if (!int.TryParse(this.PageSizeItem.Text.Trim(), out num) || num <= 0) { num = 20; this.PageSizeItem.Text = "20"; } else { isTextChanged = true; } pageSize = num; } /// <summary> /// 页数Enter事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void PageSizeItem_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == System.Convert.ToChar(13)) { if (isTextChanged) { isTextChanged = false; MoveFirstItem_Click(null, null); } } } }
2、调用代码：
/// <summary> /// 加载数据 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void SelectForm_Load(object sender, EventArgs e) { LoadData(); pagerControl1.OnPageChanged += new EventHandler(pagerControl1_OnPageChanged); } /// <summary> /// 分页控件改变事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void pagerControl1_OnPageChanged(object sender, EventArgs e) { LoadData(); } /// <summary> /// 加载数据 /// </summary> /// <param name="index"></param> /// <param name="pagesize"></param> private void LoadData() { List<Template> templateList = new List<Template>(); HttpHelper http = new HttpHelper(); string url = string.Format("https://www.baidu.com?page={0}&pagecount={1}", this.pagerControl1.PageIndex, this.pagerControl1.PageSize); string result = http.CollectHtml(url, "", HttpHelper.Method.GET, HttpHelper.HtmlEncoding.UTF8, HttpHelper.HtmlEncoding.UTF8); var resultData = JsonConvert.DeserializeObject<JObject>(result); //分页信息 if (resultData["flipinfo"] != null) { Page page = JsonConvert.DeserializeObject<Page>(resultData["flipinfo"].ToString()); if (page != null) { pagerControl1.DrawControl(page.total); } } }
以上是实际项目中使用的代码，供大家参考。