分页效果如上图所示，用到的控件均为基本控件 ，其方法如下
右击项目-添加-新建项 选择用户控件 然后在用户控件中拖入所需要的Label，Button，Text
用户控件全部代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace One.UI
{
public partial class PagerControl : UserControl
{
public PagerControl()
{
InitializeComponent();
}
#region 分页字段和属性
private int pageIndex = 1;
/// <summary>
/// 当前页数
/// </summary>
public virtual int PageIndex
{
get { return pageIndex; }
set { pageIndex = value; }
}
private int pageSize = 100;
/// <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;
}
}
#endregion
#region 页码变化时触发事件
public event EventHandler OnPageChanged;
#endregion
#region 分页及相关事件功能实现
/// <summary>
/// 设窗体控件全部可用
/// </summary>
private void SetFormCtrEnabled()
{
linkFirst.Enabled = true;
linkPrevious.Enabled = true;
linkNext.Enabled = true;
linkLast.Enabled = true;
}
/// <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;
}
/// <summary>
/// 用于客户端调用
/// </summary>
public void DrawControl(int count)
{
recordCount = count;
DrawControl(false);
}
/// <summary>
/// 根据不同的条件，改变页面控件的呈现状态
/// </summary>
private void DrawControl(bool callEvent)
{
txtCurrentPage.Text = PageIndex.ToString();//当前页
lblPageCount.Text = PageCount.ToString();//总页数
lblTotalCount.Text = RecordCount.ToString();//总记录数
txtPageSize.Text = PageSize.ToString();//每页记录数
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)//有且仅有一页时
{
linkFirst.Enabled = false;
linkPrevious.Enabled = false;
linkNext.Enabled = false;
linkLast.Enabled = false;
}
else if (PageIndex == 1)//当前页为第一页时
{
linkFirst.Enabled = false;
linkPrevious.Enabled = false;
}
else if (PageIndex == PageCount)//当前页为最后一页时
{
linkNext.Enabled = false;
linkLast.Enabled = false;
}
}
#endregion
#region 相关控件事件
//首页按钮
private void linkFirst_Click(object sender, EventArgs e)
{
PageIndex = 1;
DrawControl(true);
}
//上一页按钮
private void linkPrevious_Click(object sender, EventArgs e)
{
PageIndex = Math.Max(1, PageIndex - 1);
DrawControl(true);
}
//下一页按钮
private void linkNext_Click(object sender, EventArgs e)
{
PageIndex = Math.Min(PageCount, PageIndex + 1);
DrawControl(true);
}
//尾页按钮
private void linkLast_Click(object sender, EventArgs e)
{
PageIndex = PageCount;
DrawControl(true);
}
/// <summary>
/// 按下enter键，执行跳转页面功能
/// </summary>
private void txtPageNum_KeyPress(object sender, KeyPressEventArgs e)
{
int num = 0;
if (int.TryParse(txtCurrentPage.Text.Trim(), out num) && num > 0)
{
PageIndex = num;
DrawControl(true);
}
}
/// <summary>
/// 跳转页数限制
/// </summary>
private void txtCurrentPage_TextChanged(object sender, EventArgs e)
{
int num = 0;
if (int.TryParse(txtCurrentPage.Text.Trim(), out num) && num > 0)
{ //TryParse 函数，将字符串转换成等效的整数，返回bool型，判断是否转换成功。
//输入除数字以外的字符是转换不成功的
if (num > PageCount) //输入数量大于最大页数时，文本框自动显示最大页数
{
txtCurrentPage.Text = PageCount.ToString();
}
}
}
#endregion
bool isTextChanged = false;
/// <summary>
/// 每页显示的记录数改变时
/// </summary>
private void txtPageSize_TextChanged(object sender, EventArgs e)
{
int num = 0;
//输入不符合规范时，默认设置为100
if (!int.TryParse(txtPageSize.Text.Trim(), out num) || num <= 0)
{
num = 100;
txtPageSize.Text = "100";
}
else
{
isTextChanged = true;
}
pageSize = num;
}
/// <summary>
/// 光标离开 每页设置文本框时，显示到首页
private void txtPageSize_Leave(object sender, EventArgs e)
{
if (isTextChanged)
{
isTextChanged = false;
linkFirst_Click(null, null);
}
}
}
}
用户控件完成后，生成解决方案就会在左侧工具栏中看到刚写好的分页控件，拖入到需要分页的窗体中赋值调用即可；
在窗体加载事件中激活分页控件方法
private void OneForm_Load(object sender, EventArgs e)
{
ShowData();
//激活OnPageChanged事件
pagerControl1.OnPageChanged += new EventHandler(pagerControl1_OnPageChanged);
}
分页控件页码发生变化时执行方法
private void pagerControl1_OnPageChanged(object sender, EventArgs e)
{
ShowData();
}
绑定Datagridview方法
private void ShowData()
{
int count;///4.6日
string strWhere = " 1=1 ";
//可以添加where条件
pagerControl1.PageSize = 30;//设置显示记录数
ds = bll.GetList(pagerControl1.PageIndex, pagerControl1.PageSize, strWhere, out count);//4.6
dataGridViewX1.DataSource = ds.Tables[0];
pagerControl1.DrawControl(count);
}
bll.GetList为数据读取返回dataset类型
public DataSet GetList(int PageIndex, int PageSize, string strWhere, out int count)
{
StringBuilder strSql = new StringBuilder();
//strSql.Append(" select * from ( ");
strSql.Append(" select ROW_NUMBER() over(order by Material_TimeAdd) num,* ");
strSql.Append(" FROM tabel");
if (strWhere.Trim() != "")
{
strSql.Append(" where " + strWhere);
}
count = DbHelperSQL.Query(strSql.ToString()).Tables[0].Rows.Count;
strSql.Append(" ) t where t.num between " + ((PageIndex - 1) * PageSize + 1) + " and " + PageSize * PageIndex);
DataSet ds = DbHelperSQL.Query(" select * from ( " + strSql.ToString());
return ds;
}
第一次写东西，希望能够帮助需要的人。。。。。。
时间： 2024-10-25 13:45:06