C# 使用dataGridView导入导出excel(NPOI),可以通过关键字定位,删除空行等功能

  • C# 使用dataGridView导入导出excel(NPOI),可以通过关键字定位,删除空行等功能已关闭评论
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所属分类:.NET技术
摘要

做下记录,首先插入一个dataGridView控件,两个button按钮(导入数据,导出数据),一个ComboBox(获取列标题使用),一个textbox(输入关键字),一个定位按钮(定位使用)

做下记录,

首先插入一个dataGridView控件,两个button按钮(导入数据,导出数据),一个ComboBox(获取列标题使用),一个textbox(输入关键字),一个定位按钮(定位使用)

1,导入数据(NPOI)

 1     2         private void daoRuShuJu_cmd_Click(object sender, EventArgs e)  3         {  4             DataTable daNpoi = new DataTable();  5             string fileName = Application.StartupPath;  6             fileName += "\4G模组表.xls";    7             string sheetName = "4G模组情况表";  8             bool isColumnName = true;  9             IWorkbook workbook; 10             string fileExt = Path.GetExtension(fileName).ToString(); 11             using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read)) 12             { 13                 if (fileExt == ".xlsx") 14                 { 15                     workbook = new XSSFWorkbook(fs); 16                 } 17                 else if (fileExt == ".xls") 18                 { 19                     workbook = new HSSFWorkbook(fs); 20                 } 21                 else 22                 { 23  24                     workbook = null; 25                 } 26  27                 ISheet sheet = null; 28                 if (sheetName != null && sheetName != "") 29                 { 30                     sheet = workbook.GetSheet(sheetName); 31                     if (sheet == null) 32                     { 33                         sheet = workbook.GetSheetAt(0); 34                     } 35  36                 } 37                 else 38                 { 39                     sheet = workbook.GetSheetAt(0); 40                 } 41  42                 IRow header = sheet.GetRow(sheet.FirstRowNum); 43                 int startRow = 0; 44                 if (isColumnName) 45                 { 46                     startRow = sheet.FirstRowNum + 1; 47                     for (int i = header.FirstCellNum; i < header.LastCellNum; i++) 48                     { 49                         ICell cell = header.GetCell(i); 50                         if (cell != null) 51                         { 52                             string cellValue = cell.ToString(); 53                             if (cellValue != null) 54                             { 55                                 DataColumn col = new DataColumn(cellValue); 56                                 daNpoi.Columns.Add(col); 57                             } 58                             else 59                             { 60                                 DataColumn col = new DataColumn(); 61                                 daNpoi.Columns.Add(col); 62                             } 63                         } 64                     } 65                 } 66  67                 for (int i = startRow; i <= sheet.LastRowNum; i++) 68                 { 69                     IRow row = sheet.GetRow(i); 70                     if (row == null) 71                     { 72                         continue; 73                     } 74                     DataRow dr = daNpoi.NewRow(); 75                     for (int j = row.FirstCellNum; j < row.LastCellNum; j++) 76                     { 77  78                         if (row.GetCell(j) != null) 79                         { 80                             dr[j] = row.GetCell(j).ToString(); 81                         } 82                     } 83                     daNpoi.Rows.Add(dr); 84                 } 85             } 86  87             dataGridView1.DataSource = daNpoi; 88         }

2,导出数据(NPOI)

 1   private void baoCunShuJu_cmd_Click(object sender, EventArgs e)  2         {  3             DataTable dtTable = dataGridView1.DataSource as DataTable;  4             string sheetName = "4G模组情况表";   //sheet名字  5             IWorkbook wb = new HSSFWorkbook();  6             ISheet sheet = string.IsNullOrEmpty(sheetName) ? wb.CreateSheet("sheet1") : wb.CreateSheet(sheetName);  7             int rowIndex = 0;  8             if (dtTable.Columns.Count > 0)  9             { 10                 IRow header = sheet.CreateRow(rowIndex); 11                 for (int i = 0; i < dtTable.Columns.Count; i++) 12                 { 13                     ICell cell = header.CreateCell(i); 14                     cell.SetCellValue(dtTable.Columns[i].ColumnName); 15                 } 16             } 17             if (dtTable.Rows.Count > 0) 18             { 19                 for (int i = 0; i < dtTable.Rows.Count; i++) 20                 { 21                     rowIndex++; 22                     IRow row = sheet.CreateRow(rowIndex); 23                     for (int j = 0; j < dtTable.Columns.Count; j++) 24                     { 25                         ICell cell = row.CreateCell(j); 26                         cell.SetCellValue(dtTable.Rows[i][j].ToString()); 27                     } 28                 } 29             } 30  31             for (int i = 0; i < dtTable.Columns.Count; i++) 32             { 33                 sheet.AutoSizeColumn(i); 34             } 35  36             string fileName = Application.StartupPath;      // debug 目录                      37             fileName += "\4G模组表.xls";  //excel 名字 38             using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write)) 39             { 40                 wb.Write(fs); 41             } 42             MessageBox.Show("保存成功"); 43         }

3,删除空行函数

// 删除空白行调用函数,在不需要用户添加新行或者数据的时候使用,ALLowUsertoAddRows 这个属性需要设置false
//如果ALLowUsertoAddRows 这个属性是true,则,用户可以输入数据,但是row < view.Rows.Count需要 -1不去判断最后一行

// 所以传入的x根据情况更改,想用户可以输入,ALLowUsertoAddRows的值为true,    x=0;

//不想用户输入ALLowUsertoAddRows的值为false    x=1;

 1  private void clearGrid(DataGridView view, int x)  2         {  3             for (int row = 0; row < (view.Rows.Count - x); ++row)  4             {  5                 bool isEmpty = true;  6                 for (int col = 0; col < view.Columns.Count; ++col)  7                 {  8                     object value = view.Rows[row].Cells[col].Value;  9                     if (value != null && value.ToString().Length > 0) 10                     { 11                         isEmpty = false; 12                         break; 13                     } 14                 } 15                 if (isEmpty) 16                 { 17                     view.Rows.RemoveAt(row--); 18                 } 19             } 20         }

4,获取excel的列标题,给ComboBox控件

 1  public void huoQu_Column()   //把excel表各列标题弄到combobox上  2         {  3            // int Rowcount = dataGridView1.RowCount;//获取datagridview的行数  4             int Columncount = dataGridView1.ColumnCount;//获取datagridview的列数  5            // dataGridView2.ColumnCount = Columncount;  //新增列  6            // dataGridView2.ColumnHeadersVisible = true;  //新增的列显示出来  7             for (int i = 0; i < Columncount; i++)  8             {  9                 string var = this.dataGridView1.Columns[i].HeaderText; 10                // this.dataGridView2.Columns[i].HeaderText = this.dataGridView1.Columns[i].HeaderText;  //2的列名和1的一样 11               //  dataGridView2.Columns[i].MinimumWidth = dataGridView1.Columns[i].MinimumWidth;   //2的列宽和1 一样 12                 // = dataGridView1.Rows[0].Cells[i].Value.ToString(); 13                 lie_ming_cb.Items.Add(var); 14               //  lie_ming_cb_1.Items.Add(var); 15                // if (var == "IMEI") 16                // { 17                    // lie_ming_cb_1.SelectedIndex = i; 18               //  } 19             } 20             lie_ming_cb.SelectedIndex = 0; 21         }

 

5,定位,可以在每个列里根据关键字去查找,并且定位到行,可实现下一条功能

 1  int xiayitiao_int = 0;  //下一条标记  2   3         private void chaZhao_bt_1_Click(object sender, EventArgs e)   //定位按钮  4         {  5             DataTable rentTable = (DataTable)dataGridView1.DataSource;//获取数据源  6             int r = 0;  7             bool dingwei_f;  //定位标记,  8   9  10             if ((guanJianZi_box.Text != "") && (guanJianZi_box.Text != "/请输入关键字/")) 11             { 12                 for (int i = xiayitiao_int; i < rentTable.Rows.Count; i++) 13                 { 14                     dingwei_f = rentTable.Rows[i][lie_ming_cb.Text].ToString().Contains(guanJianZi_box.Text); //对比字符串, 15  16                     if (dingwei_f) 17                     { 18                         //指定行 19                         dataGridView1.ClearSelection(); 20                         dataGridView1.Rows[i].Selected = true; 21                         //让指定行处于选中状态(状态) 22                         dataGridView1.CurrentCell = dataGridView1.Rows[i].Cells[1]; 23                         dataGridView1.CurrentRow.Selected = true; 24                         dingwei_f = false; 25                         xiayitiao_int = i+1; //下一条的标记 26                         r++; 27                         return; 28                     } 29                 } 30                 if (r > 0) 31                 { 32  33                 } 34                 else 35                 { 36                     MessageBox.Show("没有匹配项或已经是最后一条,将从第一条继续查找", "提示"); 37                     xiayitiao_int = 0;   //重新查找 38                 } 39             } 40             else 41             { 42                 MessageBox.Show("请输入正确的关键字", "提示"); 43             } 44         }

6,textbox可以敲回车直接查找,需要添加textbox的KeyDown事件

 private void guanJianZi_box_KeyDown(object sender, KeyEventArgs e)         {             if (e.KeyValue == 13)             {                 chaZhao_bt_1_Click(sender, e);             }         }