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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： 总结 以上所述是小编给大家介绍的DataGridView使用自定义控件实现简单分页功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对极客世界网站的支持！ |
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