C# Excel 操做

將Excel 文件導入到dataGridView中

 1 /// Excel數據導入DataGridView
 2         public void EcxelToDataGridView(string filePath, DataGridView dgv)
 3         {
 4             //根據路徑打開一個Excel文件並將數據填充到DataSet中
 5             //string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + filePath + ";Extended Properties ='Excel 8.0;HDR=NO;IMEX=1'";//HDR=YES 有兩個值:YES/NO,表示第一行是否字段名,默認是YES,第一行是字段名
 6 
 7             string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + filePath + ";" + "Extended Properties='Excel 12.0;HDR=Yes;IMEX=1'";
 8 
 9             OleDbConnection conn = new OleDbConnection(strConn);
10             conn.Open();
11             string strExcel = "";
12             OleDbDataAdapter myCommand = null;
13             DataSet ds = null;
14             strExcel = "select  * from   [sheet1$]";
15             myCommand = new OleDbDataAdapter(strExcel, strConn);
16             ds = new DataSet();
17             myCommand.Fill(ds, "table1");
18 
19             //conn.Close();
20             //dgv.DataMember = "[sheet1$]";
21             //dgv.DataSource = ds;
22             //return;
23 
24             //根據DataGridView的列構造一個新的DataTable
25             System.Data.DataTable tb = new System.Data.DataTable();
26 
27             tb = ds.Tables["table1"];
28 
29             //foreach (DataGridViewColumn dgvc in dgv.Columns)
30             //{
31             //    if (dgvc.Visible && dgvc.CellType != typeof(DataGridViewCheckBoxCell))
32             //    {
33             //        DataColumn dc = new DataColumn();
34             //        dc.ColumnName = dgvc.DataPropertyName;
35             //        //dc.DataType = dgvc.ValueType;//若須要限制導入時的數據類型則取消註釋，前提是DataGridView必須先綁定一個數據源那怕是空的DataTable
36           
37             dgv.Columns.Clear();
38             //在DataGridView中顯示導入的數據
39             dgv.DataSource = tb;
40 
41             dgv.DefaultCellStyle.BackColor = Color.AliceBlue; //單元格背景顏色
42             dgv.AlternatingRowsDefaultCellStyle.BackColor = Color.LightSkyBlue; //奇數行的背景色
43             //datagridview backcolor 
44             dgv.DefaultCellStyle.SelectionBackColor = Color.LimeGreen; //選中單元格顏色
45             dgv.DefaultCellStyle.SelectionForeColor = Color.Blue; //選中單元格內字體顏色
46 
47             dgv.DefaultCellStyle.Font = new System.Drawing.Font("Arial", 9, FontStyle.Regular);//單元格內文本的字體設置
48             dgv.DefaultCellStyle.ForeColor = Color.Black; //單元格內字體顏色 
49             dgv.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single; //列標題格式
50             dgv.ColumnHeadersVisible = true;   //列標題可見
51             dgv.ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("Arial", 9, FontStyle.Bold); //列標題字體設置
52             dgv.ColumnHeadersDefaultCellStyle.BackColor = Color.LimeGreen;  //列標頭背景色
53             dgv.ColumnHeadersDefaultCellStyle.ForeColor = Color.Blue;
54 
55             dgv.Columns[0].Width = 100;
56             dgv.Columns[1].Width = 100;
57             dgv.Columns[2].Width = 280;
58 
59             dgv.RowHeadersVisible = false;
60             dgv.AllowUserToAddRows = false;
61             dgv.AllowUserToResizeColumns = false;
62             dgv.AllowUserToResizeRows = false;
63             //dgv.ReadOnly = true;
64 
65             dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
66         }

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將dataGridView保存爲Excel文件

 1  /// <summary>
 2         /// DataGridView數據保存爲Excel
 3         /// </summary>
 4         private void ExportExc()
 5         {
 6             SaveFileDialog dg = new SaveFileDialog();//保存文件對話框，選擇導出文件的存放位置
 7             dg.Filter = "xls files(*.xls)|*.xls";//保存爲xls格式
 8             if (dg.ShowDialog() == DialogResult.OK)
 9             {
10                 string filepath = dg.FileName.ToString();//保存文件的路徑
11 
12                 Microsoft.Office.Interop.Excel.Workbooks objBooks;//接口 workbooks
13                 Microsoft.Office.Interop.Excel.Sheets objSheets;// 接口 sheets
14                 Microsoft.Office.Interop.Excel._Worksheet objSheet;//接口 worksheet
15                 excel = new Microsoft.Office.Interop.Excel.Application();
16                 objBooks = excel.Workbooks;
17                 Object miss = System.Reflection.Missing.Value;
18                 objBook = objBooks.Add(miss);
19                 objSheets = objBook.Sheets;
20                 objSheet = (Microsoft.Office.Interop.Excel._Worksheet)objSheets[1];
21                 try
22                 {
23 
24                     if (dataGridView1.Rows.Count == 0) //沒有數據的話就不往下執行   
25                         return;
26 
27 
28                     excel.Visible = false; //讓後臺執行設置爲不可見，爲true的話會看到打開一個Excel，而後數據在往裏寫   
29 
30                     for (int i = 0; i < dataGridView1.Columns.Count; i++) //生成Excel中列頭名稱   
31                     {
32                         objSheet.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText;
33                     }
34 
35                     for (int i = 0; i < dataGridView1.Rows.Count; i++) //把DataGridView當前頁的數據保存在Excel中   
36                     {
37                         for (int j = 0; j < dataGridView1.Columns.Count; j++)
38                         {
39                             if (dataGridView1[j, i].ValueType == typeof(string))
40                             {
41                                 objSheet.Cells[i + 2, j + 1] = "'" + dataGridView1[j, i].Value.ToString();
42                             }
43                             else
44                             {
45                                 objSheet.Cells[i + 2, j + 1] = dataGridView1[j, i].Value.ToString();
46                             }
47                         }
48                     }
49                     objBook.SaveCopyAs(filepath);
50                     //設置禁止彈出保存和覆蓋的詢問提示框   
51                     excel.DisplayAlerts = false;
52                     excel.AlertBeforeOverwriting = false;
53 
54                     //確保Excel進程關閉   
55                     objBooks.Close();
56                     excel.Workbooks.Close();
57                     excel.Quit();
58                     excel = null;
59                     GC.Collect();
60                     MessageBox.Show("數據導出完成!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
61                     if (System.IO.File.Exists(filepath))
62                         System.Diagnostics.Process.Start(filepath); //保存成功後打開此文件
63 
64                 }
65                 catch (Exception ex)
66                 {
67                     MessageBox.Show(ex.Message, "錯誤提示");
68                 }
69             }
70         }

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