C# DataGridView使用自定义控件实现简单分页功能
本例子使用自定义控件方法实现，数据库使用的是SQL Server，实现过程如下：
1、新建一个自定义控件，命名为：PageControl。
2、PageControl代码如下：
public partial class PageControl : UserControl { //委托及事件 public delegate void BindPage(int pageSize, int pageIndex, out int totalCount); public event BindPage BindPageEvent; //属性 public int PageSize { get; set; } = 1; //每页显示记录数 public int PageIndex { get; set; } //页序号 public int TotalCount { get; set; } //总记录数 public int PageCount { get; set; } //总页数 public PageControl() { InitializeComponent(); //取消下划线 linkFirst.LinkBehavior = LinkBehavior.NeverUnderline; linkPrev.LinkBehavior = LinkBehavior.NeverUnderline; linkNext.LinkBehavior = LinkBehavior.NeverUnderline; linkLast.LinkBehavior = LinkBehavior.NeverUnderline; linkGo.LinkBehavior = LinkBehavior.NeverUnderline; } /// <summary> /// 设置页 /// </summary> public void SetPage() { //总记录数 int totalCount = 0; BindPageEvent(PageSize, PageIndex + 1, out totalCount); TotalCount = totalCount; //总页数 if (TotalCount % PageSize == 0) PageCount = TotalCount / PageSize; else PageCount = TotalCount / PageSize + 1; //当前页及总页数 txtCurrentPage.Text = (PageIndex + 1).ToString(); lblTotalPage.Text = "共 " + PageCount.ToString() + " 页"; } /// <summary> /// 首页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkFirst_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { if (e.Button == MouseButtons.Left) { PageIndex = 0; SetPage(); } } /// <summary> /// 上一页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkPrve_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { if (e.Button == MouseButtons.Left) { PageIndex--; if (PageIndex < 0) { PageIndex = 0; } SetPage(); } } /// <summary> /// 下一页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkNext_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { if (e.Button == MouseButtons.Left) { PageIndex++; if (PageIndex > PageCount - 1) { PageIndex = PageCount - 1; } SetPage(); } } /// <summary> /// 末页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkLast_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { if (e.Button == MouseButtons.Left) { PageIndex = PageCount - 1; SetPage(); } } /// <summary> /// 只能按0-9、Delete、Enter、Backspace键 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void txtSetPage_KeyPress(object sender, KeyPressEventArgs e) { if ((e.KeyChar >= 48 && e.KeyChar <= 57) || e.KeyChar == 8 || e.KeyChar == 13 || e.KeyChar == 127) { e.Handled = false; if (e.KeyChar == 13) { Go(); } } else { e.Handled = true; } } /// <summary> /// 指定页 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkGo_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { if (e.Button == MouseButtons.Left) { Go(); } } private void Go() { if (string.IsNullOrEmpty(txtCurrentPage.Text)) { MessageBox.Show("指定页不能为空。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); txtCurrentPage.Focus(); return; } if (int.Parse(txtCurrentPage.Text) > PageCount) { MessageBox.Show("指定页已超过总页数。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); txtCurrentPage.Focus(); return; } PageIndex = int.Parse(txtCurrentPage.Text) - 1; SetPage(); } /// <summary> /// linkFirst鼠标移过颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkFirst_MouseMove(object sender, MouseEventArgs e) { linkFirst.LinkColor = Color.Red; } /// <summary> /// linkFirst鼠标离开颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkFirst_MouseLeave(object sender, EventArgs e) { linkFirst.LinkColor = Color.Black; } /// <summary> /// linkPrev鼠标移过颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkPrev_MouseMove(object sender, MouseEventArgs e) { linkPrev.LinkColor = Color.Red; } /// <summary> /// linkPrev鼠标离开颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkPrev_MouseLeave(object sender, EventArgs e) { linkPrev.LinkColor = Color.Black; } /// <summary> /// linkNext鼠标移过颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkNext_MouseMove(object sender, MouseEventArgs e) { linkNext.LinkColor = Color.Red; } /// <summary> /// linkNext鼠标离开颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkNext_MouseLeave(object sender, EventArgs e) { linkNext.LinkColor = Color.Black; } /// <summary> /// linkLast鼠标移过颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkLast_MouseMove(object sender, MouseEventArgs e) { linkLast.LinkColor = Color.Red; } /// <summary> /// linkLast鼠标离开颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkLast_MouseLeave(object sender, EventArgs e) { linkLast.LinkColor = Color.Black; } /// <summary> /// linkGo鼠标移过颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkGo_MouseMove(object sender, MouseEventArgs e) { linkGo.LinkColor = Color.Red; } /// <summary> /// linkGo鼠标离开颜色 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void linkGo_MouseLeave(object sender, EventArgs e) { linkGo.LinkColor = Color.Black; } }
3、SQL Server创建存储过程PageTest：
CREATE PROCEDURE [dbo].[PageTest] @PageSize INT, @PageIndex INT, @TotalCount INT OUTPUT AS BEGIN --总记录数 SELECT @TotalCount=COUNT(1) FROM MF_MO --记录返回(使用动态SQL绕开参数嗅探问题，效率大幅度提升。) DECLARE @SQL NVARCHAR(1000) SET @SQL= 'SELECT TOP ('+CONVERT(VARCHAR(32),@PageSize)+') MO_NO,MRP_NO,QTY,BIL_NO '+ 'FROM MF_MO A '+ 'WHERE NOT EXISTS (SELECT 1 FROM (SELECT TOP ('+CONVERT(VARCHAR(32),(@PageIndex-1)*@PageSize)+') MO_NO FROM MF_MO ORDER BY MO_NO) B WHERE A.MO_NO=B.MO_NO) '+ 'ORDER BY MO_NO' EXEC (@SQL) END
4、新建一个WinForm程序，命名为Main，并拖入一个DataGridView控件及上面新建的PageControl控件，代码如下：
private void Main_Load(object sender, EventArgs e) { pageControl1.PageSize = 20; pageControl1.PageIndex = 0; pageControl1.BindPageEvent += BindPage; pageControl1.SetPage(); } /// <summary> /// 绑定页 /// </summary> /// <param name="pageSize">每页显示记录数</param> /// <param name="pageIndex">页序号</param> /// <param name="totalCount">总记录数</param> private void BindPage(int pageSize, int pageIndex, out int totalCount) { SqlConnection conn = null; SqlCommand cmd = null; totalCount = 0; #region 连接数据库测试 try { //数据库连接 conn = new SqlConnection("server=.;database=DB_TEST;Uid=sa;pwd=********;"); conn.Open(); //SqlCommand cmd = new SqlCommand(); cmd.Connection = conn; cmd.CommandText = "PageTest"; cmd.CommandType = CommandType.StoredProcedure; SqlParameter[] param = { new SqlParameter("@PageSize",SqlDbType.Int), new SqlParameter("@PageIndex",SqlDbType.Int), new SqlParameter("@TotalCount",SqlDbType.Int) }; param[0].Value = pageSize; param[1].Value = pageIndex; param[2].Direction = ParameterDirection.Output; cmd.Parameters.AddRange(param); //DataTable DataTable dt = new DataTable("MF_MO"); dt.Columns.Add(new DataColumn("MO_NO", typeof(String))); dt.Columns.Add(new DataColumn("MRP_NO", typeof(String))); dt.Columns.Add(new DataColumn("QTY", typeof(Decimal))); dt.Columns.Add(new DataColumn("BIL_NO", typeof(String))); #region 方法一：SqlDataReader SqlDataReader dr = cmd.ExecuteReader(); dt.Load(dr, LoadOption.PreserveChanges); dr.Close(); totalCount = (int)param[2].Value; dataGridView1.DataSource = dt; #endregion #region #方法二：SqlDataAdapter //SqlDataAdapter da = new SqlDataAdapter(); //da.SelectCommand = cmd; //dt.BeginLoadData(); //da.Fill(dt); //dt.EndLoadData(); //totalCount = (int)param[2].Value; //dataGridView1.DataSource = dt; #endregion } catch (Exception ex) { MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); } finally { conn.Close(); cmd.Dispose(); } #endregion }
5、执行程序：
好了，分享就到此结束了，希望对有此需要的人有一些帮助。