winform中DataGridView实现分页功能

winform中DataGridView实现分页功能在winform的设计中，要实现对DataGridView控件的分页功能，需要两个控件：BindingSource、BindingNavigator，根据需求可对BindingNavigator进行自由的扩展，下图的示例则是根据一般需求对分页功能的实现。

红色区域是对BindingNavigator控件扩展后的效果。

具体实现过程：//窗体构造方法中定义分页所需变量：int pageSize = 0; //每页显示行数int nMax = 0; //总记录数int pageCount = 0; //页数＝总记录数/每页显示行数int pageCurrent = 0; //当前页号int nCurrent = 0; //当前记录行DataTable dtInfo = new DataTable(); //存取查询数据结果//分页功能实现public void InitDataSet(){//判断每页显示记录数是否为空，在初始话窗体时为真if (txtRecordNumOfPage.Text.Trim() == ""){try{//pageSize =Convert.ToInt16(ConfigurationManager.AppSettings["PageSize"]); //设置页面行数//读取配置文件中设置的每页显示条数string szConfigFileName = Application.ExecutablePath + ".config"; XmlDocument doc = new XmlDocument();doc.Load(szConfigFileName);XmlNode root = doc.SelectSingleNode("configuration");XmlNode node =root.SelectSingleNode("appSettings/add[@key='PageSize']");XmlElement el = node as XmlElement;pageSize = Convert.ToUInt16(el.GetAttribute("value"));}catch{}if (pageSize == 0){pageSize = 20; //如果读取配置文件失败，则默认将每页显示条数设置为20}txtRecordNumOfPage.Text = pageSize.ToString(); //界面显示的“每页记录数”赋值}else{//读取界面设置的每页显示条数pageSize = Convert.ToUInt16(txtRecordNumOfPage.Text.Trim());}//总记录数赋值nMax = dtInfo.Rows.Count;pageCount = (nMax / pageSize); //采用整除计算页数//判断整除后是否有余数，有则对页数进行+1if ((nMax % pageSize) > 0) pageCount++;pageCurrent = 1; //当前页数从1开始nCurrent = 0; //当前记录数从0开始//调用显示数据方法LoadData();}//显示数据方法private void LoadData(){int nStartPos = 0; //当前页面开始记录行int nEndPos = 0; //当前页面结束记录行//判断查询结果是否为空if (dtInfo.Rows.Count == 0){dgvExperInfo.DataSource = null;return;}else{DataTable dtTemp = dtInfo.Clone(); //克隆DataTable结构，即将字段名称进行复制if (pageCurrent == 1){bindingNavigatorMoveFirstPage.Enabled = false;bindingNavigatorMovePreviousPage.Enabled = false;}else{bindingNavigatorMoveFirstPage.Enabled = true;bindingNavigatorMovePreviousPage.Enabled = true;}if (pageCurrent == pageCount){nEndPos = nMax;bindingNavigatorMoveLastPage.Enabled = false;bindingNavigatorMoveNextPage.Enabled = false;}else{bindingNavigatorMoveLastPage.Enabled = true;bindingNavigatorMoveNextPage.Enabled = true;nEndPos = pageSize * pageCurrent;}nStartPos = nCurrent;lblPageCount.Text = pageCount.ToString(); //界面显示总页数 lblCurrentPage.Text = Convert.ToString(pageCurrent);//当前页数txtCurrentPage.Text = Convert.ToString(pageCurrent);//跳转到页数的显示//从元数据源复制记录行for (int i = nStartPos; i < nEndPos; i++){dtTemp.ImportRow(dtInfo.Rows[i]);nCurrent++;}bdsInfo.DataSource = dtTemp;bdnInfo.BindingSource = bdsInfo;dgvExperInfo.DataSource = bdsInfo;dgvExperInfo.ClearSelection();}}//BindingNavigator控件上的项目点击事件，通过配置各个Item的Text值进行判断执行private void bdnInfo_ItemClicked(object sender, ToolStripItemClickedEventArgs e){if (e.ClickedItem.Text == "上一页"){pageCurrent--;if (pageCurrent <= 0){MessageBox.Show("已经是第一页，请点击“下一页”查看！");pageCurrent++;return;}else{nCurrent = pageSize * (pageCurrent - 1);}LoadData();}if (e.ClickedItem.Text == "下一页"){pageCurrent++;if (pageCurrent > pageCount){MessageBox.Show("已经是最后一页，请点击“上一页”查看！"); pageCurrent--;return;}else{nCurrent=pageSize*(pageCurrent-1);}LoadData();}if (e.ClickedItem.Text == "首页"){pageCurrent = 1;nCurrent = 0;LoadData();}if (e.ClickedItem.Text == "尾页"){pageCurrent = pageCount;nCurrent = pageSize * (pageCurrent - 1);LoadData();}}//跳转页实现private void btnPage_Click(object sender, EventArgs e){if (txtCurrentPage.Text.Trim() != ""){pageCurrent = Convert.ToInt16(txtCurrentPage.Text.Trim());//若输入页号大于最大显示页号，则跳转至最大页if (pageCurrent > pageCount){pageCurrent = pageCount;nCurrent = pageSize * (pageCurrent - 1);}//若输入页号小于1，则跳转至第一页else if (pageCurrent < 1){pageCurrent = 1;nCurrent = 0;LoadData();}//跳转至输入页号else{nCurrent = pageSize * (pageCurrent - 1); //当前行数定位 }//调用加载数据方法LoadData();}}private void txtCurrentPage_TextChanged(object sender, EventArgs e){bool IsNum = true;foreach (char c in txtCurrentPage.Text.Trim()){if (!char.IsNumber(c)) { IsNum = false; break; }}if (IsNum == false){txtCurrentPage.Text = pageCurrent.ToString();}}//当前页回车事件调用跳转页的操作private void txtCurrentPage_KeyPress(object sender, KeyPressEventArgs e) {if (e.KeyChar == 13){btnPage_Click(sender,e);}}//每页显示记录数变更事件private void txtRecordNumOfPage_TextChanged(object sender, EventArgs e) {bool IsNum = true;foreach (char c in txtRecordNumOfPage.Text.Trim()){if (!char.IsNumber(c)) { IsNum = false; break; }}if (IsNum == false){txtRecordNumOfPage.Text = pageSize.ToString();}//判断输入的每页显示条数是否为空或是否为0，输入长度是否大于4位等情况if (txtRecordNumOfPage.Text.Trim() == "" ||Convert.ToUInt32(txtRecordNumOfPage.Text.Trim()) == 0 ||txtRecordNumOfPage.Text.Trim().Length > 4){txtRecordNumOfPage.Text = pageSize.ToString();}//规避了特殊情况后直接调用显示数据方法LoadDocInfoToDGV();}至此，winform中对DataGridView控件的分页功能已经实现，该方法是在网上查了相关资料后参照一些常用的分页效果进行了一些扩展，也在组长的要求下，完善了一些细节上的工作：由于屏幕分辨率的不同，用户可自行对每页显示条数进行设置，设置结果可以在关闭窗体的事件中保存至配置文件，下次进行默认读取；对分页控件中按钮操作的优化，判断是否能够使用的功能，代码中已经进行了体现；另外由于显示器分辨率不尽相同，需要在窗体加载时，设置控件显示的位置，也同样需要代码进行控制。