Excel
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; namespace Excel { public partial class Form1 : Form { DataSet newDataset = new DataSet(); public Form1() { InitializeComponent(); string file = "D:\\***.xlsx"; //TestExcelWrite(file); DataTable dt = TestExcelRead(file); DataSet ds = new DataSet(); ds.Tables.Add(dt); newDataset = ds; this.dataGridView1.DataSource = ds.Tables[0]; DataSet d = newDataset.GetChanges(); } public static int updateTable(DataTable dt, string sql) { using (System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(SqlConnStr)) { using (SqlDataAdapter da = new SqlDataAdapter(sql, conn)) { conn.Open(); SqlCommandBuilder sb = new SqlCommandBuilder(da); try { int i = da.Update(dt); return i; } catch (Exception ex) { throw ex; } } } } static DataTable GenerateData() { DataTable data = new DataTable(); for (int i = 0; i < 5; ++i) { data.Columns.Add("Columns_" + i.ToString(), typeof(string)); } for (int i = 0; i < 10; ++i) { DataRow row = data.NewRow(); row["Columns_0"] = "item0_" + i.ToString(); row["Columns_1"] = "item1_" + i.ToString(); row["Columns_2"] = "item2_" + i.ToString(); row["Columns_3"] = "item3_" + i.ToString(); row["Columns_4"] = "item4_" + i.ToString(); data.Rows.Add(row); } return data; } static void PrintData(DataTable data) { if (data == null) return; for (int i = 0; i < data.Rows.Count; ++i) { for (int j = 0; j < data.Columns.Count; ++j) Console.Write("{0} ", data.Rows[i][j]); Console.Write("\n"); } } static void TestExcelWrite(string file) { try { using (ExcelHelper excelHelper = new ExcelHelper(file)) { DataTable data = GenerateData(); int count = excelHelper.DataTableToExcel(data, "MySheet", true); if (count > 0) Console.WriteLine("Number of imported data is {0} ", count); } } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); } } static DataTable TestExcelRead(string file) { try { using (ExcelHelper excelHelper = new ExcelHelper(file)) { DataTable dt = excelHelper.ExcelToDataTable("Sheet1", true); return dt; } } catch (Exception ex) { return null; } } } }