winform自定义分页控件
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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。
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