C# Winform 分頁功能的實現(xiàn)
更新時間：2022年06月23日 11:04:20 作者：正人君子！
本文主要介紹了C# Winform 分頁功能的實現(xiàn)，文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值，需要的朋友們下面隨著小編來一起學習學習吧
首先創(chuàng)建一個用戶控件 如下圖 用到的控件 label、button、TextBox
內部代碼如下
#region 分頁字段和屬性
private int pageIndex = 1;
/// <summary>
/// 當前頁數(shù)
/// </summary>
public virtual int PageIndex
{
get { return pageIndex; }
set { pageIndex = value; }
}
private int pageSize = 100;
/// <summary>
/// 每頁記錄數(shù)
/// </summary>
public virtual int PageSize
{
get { return pageSize; }
set { pageSize = value; }
}
private int recordCount = 0;
/// <summary>
/// 總記錄數(shù)
/// </summary>
public virtual int RecordCount
{
get { return recordCount; }
set { recordCount = value; }
}
private int pageCount = 0;
/// <summary>
/// 總頁數(shù)
/// </summary>
public int PageCount
{
get
{
if (pageSize != 0)
{
pageCount = GetPageCount();
}
return pageCount;
}
}
#endregion
#region 頁碼變化時觸發(fā)事件
public event EventHandler OnPageChanged;
#endregion
#region 分頁及相關事件功能實現(xiàn)
/// <summary>
/// 設窗體控件全部可用
/// </summary>
private void SetFormCtrEnabled()
{
linkFirst.Enabled = true;
linkPrevious.Enabled = true;
linkNext.Enabled = true;
linkLast.Enabled = true;
btnGo.Enabled = true;
}
/// <summary>
/// 計算總頁數(shù)
/// </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>
/// 用于客戶端調用
/// </summary>
public void DrawControl(int count)
{
recordCount = count;
DrawControl(false);
}
/// <summary>
/// 根據(jù)不同的條件，改變頁面控件的呈現(xiàn)狀態(tài)
/// </summary>
private void DrawControl(bool callEvent)
{
lblCurrentPage.Text = PageIndex.ToString();
lblPageCount.Text = PageCount.ToString();
lblTotalCount.Text = RecordCount.ToString();
txtPageSize.Text = PageSize.ToString();
if (callEvent && OnPageChanged != null)
{
OnPageChanged(this, null);//當前分頁數(shù)字改變時，觸發(fā)委托事件
}
SetFormCtrEnabled();
if (PageCount == 1)//有且僅有一頁時
{
linkFirst.Enabled = false;
linkPrevious.Enabled = false;
linkNext.Enabled = false;
linkLast.Enabled = false;
btnGo.Enabled = false;
}
else if (PageIndex == 1)//當前頁為第一頁時
{
linkFirst.Enabled = false;
linkPrevious.Enabled = false;
}
else if (PageIndex == PageCount)//當前頁為最后一頁時
{
linkNext.Enabled = false;
linkLast.Enabled = false;
}
}
#endregion
#region 相關控件事件
//首頁按鈕
private void linkFirst_Click(object sender, EventArgs e)
{
PageIndex = 1;
DrawControl(true);
}
//上一頁按鈕
private void linkPrevious_Click(object sender, EventArgs e)
{
PageIndex = Math.Max(1, PageIndex - 1);
DrawControl(true);
}
//下一頁按鈕
private void linkNext_Click(object sender, EventArgs e)
{
PageIndex = Math.Min(PageCount, PageIndex + 1);
DrawControl(true);
}
//尾頁按鈕
private void linkLast_Click(object sender, EventArgs e)
{
PageIndex = PageCount;
DrawControl(true);
}
/// <summary>
/// 按下enter鍵，執(zhí)行跳轉頁面功能
/// </summary>
private void txtPageNum_KeyPress(object sender, KeyPressEventArgs e)
{
btnGo_Click(null, null);
}
/// <summary>
/// 跳轉頁數(shù)限制
/// </summary>
private void txtPageNum_TextChanged(object sender, EventArgs e)
{
int num = 0;
if (int.TryParse(txtPageNum.Text.Trim(), out num) && num > 0)
{ //TryParse 函數(shù)，將字符串轉換成等效的整數(shù)，返回bool型，判斷是否轉換成功。
//輸入除數(shù)字以外的字符是轉換不成功的
if (num > PageCount) //輸入數(shù)量大于最大頁數(shù)時，文本框自動顯示最大頁數(shù)
{
txtPageNum.Text = PageCount.ToString();
}
}
}
/// <summary>
/// 跳轉按鈕
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnGo_Click(object sender, EventArgs e)
{
int num = 0;
if (int.TryParse(txtPageNum.Text.Trim(), out num) && num > 0)
{
PageIndex = num;
DrawControl(true);
}
}
#endregion
bool isTextChanged = false;
/// <summary>
/// 每頁顯示的記錄數(shù)改變時
/// </summary>
private void txtPageSize_TextChanged(object sender, EventArgs e)
{
int num = 0;
//輸入不符合規(guī)范時，默認設置為100
if (!int.TryParse(txtPageSize.Text.Trim(), out num) || num <= 0)
{
num = 100;
txtPageSize.Text = "100";
}
else
{
isTextChanged = true;
}
pageSize = num;
}
/// <summary>
/// 光標離開 每頁設置文本框時，顯示到首頁
private void txtPageSize_Leave(object sender, EventArgs e)
{
if (isTextChanged)
{
isTextChanged = false;
linkFirst_Click(null, null);
}
}符合我的分頁查詢方法
/// <summary>
/// 通用分頁查詢方法
/// </summary>
/// <param name="tableName">表名</param>
/// <param name="strColumns">查詢字段名</param>
/// <param name="strWhere">where條件</param>
/// <param name="strOrder">排序條件</param>
/// <param name="pageSize">每頁數(shù)據(jù)數(shù)量</param>
/// <param name="currentIndex">當前頁數(shù)</param>
/// <param name="recordOut">數(shù)據(jù)總量</param>
/// <returns>DataTable數(shù)據(jù)表</returns>
public static List<String[]> SelectPaging(string tableName, string strColumns, string strWhere, string strOrder, int pageSize, int currentIndex, out int recordOut)
{
List<String[]> res;
recordOut = Convert.ToInt32(search(string.Format("select count(*) from {0} where{1}" ,tableName, strWhere))[0][0]);
string pagingTemplate = "select {0} from {1} where {2} order by {3} limit {4} offset {5} ";
int offsetCount = (currentIndex - 1) * pageSize;
string commandText = String.Format(pagingTemplate, strColumns, tableName, strWhere, strOrder, pageSize.ToString(), offsetCount.ToString());
res = search(commandText);
return res;
}附上我修改前的分頁查詢方法
/// <summary>
/// 通用分頁查詢方法
/// </summary>
/// <param name="connString">連接字符串</param>
/// <param name="tableName">表名</param>
/// <param name="strColumns">查詢字段名</param>
/// <param name="strWhere">where條件</param>
/// <param name="strOrder">排序條件</param>
/// <param name="pageSize">每頁數(shù)據(jù)數(shù)量</param>
/// <param name="currentIndex">當前頁數(shù)</param>
/// <param name="recordOut">數(shù)據(jù)總量</param>
/// <returns>DataTable數(shù)據(jù)表</returns>
public static DataTable SelectPaging(string tableName, string strColumns, string strWhere, string strOrder, int pageSize, int currentIndex, out int recordOut)
{
DataTable dt = new DataTable();
recordOut = Convert.ToInt32(ExecuteScalar( "select count(*) from " + tableName));
string pagingTemplate = "select {0} from {1} where {2} order by {3} limit {4} offset {5} ";
int offsetCount = (currentIndex - 1) * pageSize;
string commandText = String.Format(pagingTemplate, strColumns, tableName, strWhere, strOrder, pageSize.ToString(), offsetCount.ToString());
DataSet ds= ExecuteDataSet(commandText);
dt = ds.Tables[0];
return dt;
}兩種使用方式
1、數(shù)據(jù)庫查詢
private void pagerControl1_OnPageChanged(object sender, EventArgs e)
{
initData();
}
public CompanyData()
{
InitializeComponent();
initData();
//激活OnPageChanged事件
pagerControl1.OnPageChanged += new EventHandler(pagerControl1_OnPageChanged);
}
private void initData()
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(" 1=1 ");
if (this.TbComName.Text != "")
{
stringBuilder.Append("and comName like '%" + this.TbComName.Text + "%'");
}
int RecordCount;
List<String[]> res = DBHelper.SelectPaging("T_DM_COMPANY", " comId,comCode,comName,configureCode", stringBuilder.ToString(), " configureCode DESC ,comCode", pagerControl1.PageSize, pagerControl1.PageIndex, out RecordCount);
List<Company> list = new List<Company>();
for (int i = 0; i < res.Count; i++)
{
list.Add(new Company(res[i]));
}
pagerControl1.DrawControl(RecordCount);
BindingSource bs = new BindingSource();
bs.DataSource = list;
this.CompanyDataDGW.DataSource = bs;
}2、文件讀取數(shù)據(jù) 分頁
private void pagerControl1_OnPageChanged(object sender, EventArgs e)
{
Init();
}
public ProductionConfig()
{
InitializeComponent();
Init();
//激活OnPageChanged事件
pagerControl1.OnPageChanged += new EventHandler(pagerControl1_OnPageChanged);
}
private void Init()
{
//獲取template 中ip配置文件信息
//String[] temIp = PropertiesGenerateUtil.getTemplate("template/ip.properties");
int RecordCount;
String[] temIp = PropertiesGenerateUtil.getTemplatePaging("template/ip.properties",pagerControl1.PageSize,pagerControl1.PageIndex,out RecordCount);
List<entity.templateIp> templateIps = new List<entity.templateIp>();
foreach (var item in temIp)
{
templateIps.Add(new entity.templateIp(item.Substring(0, item.IndexOf("="))));
}
pagerControl1.DrawControl(RecordCount);
BindingSource bs = new BindingSource();
bs.DataSource = templateIps;
this.DGVTemplateIp.DataSource = bs;
}
/// <summary>
/// 分頁查詢文件數(shù)據(jù)
/// </summary>
/// <param name="path">文件路徑</param>
/// <param name="pageSize">每頁數(shù)量</param>
/// <param name="currentIndex">當前頁數(shù)</param>
/// <param name="recordOut">數(shù)據(jù)總量</param>
/// <returns></returns>
public static string[] getTemplatePaging(string path, int pageSize, int currentIndex, out int recordOut)
{
string[] str;
recordOut = getTemplate(path).Count();
using (StreamReader sr = new StreamReader(path))
{
string line;
List<string> list = new List<string> { };
// 1 0 1*100
// 2 100 2*100
int startingValue = (currentIndex - 1) * pageSize;//起始值
int terminationValue = currentIndex * pageSize;//終止值
int tempValue = 0;//計數(shù)器
while ((line = sr.ReadLine()) != null)
{
if (line.Contains("#"))//判斷是注釋跳出
continue;
if(tempValue>=startingValue&&tempValue< terminationValue)//判斷是起始值添加
list.Add(line);
if (tempValue == terminationValue)//判斷是終止值跳出
break;
tempValue++;
}
str = list.ToArray<String>();
}
return str;
}附上運行結果
到此這篇關于C# Winform 分頁功能的實現(xiàn)的文章就介紹到這了,更多相關C# Winform 分頁內容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！
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