{转}Excel 导入数据到GridControl中的方法

private void simpleButton1_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Title = "Excel文件";
            ofd.FileName = "";
            ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
            ofd.Filter = "所有文件(*.*)|*.*|Excel2003文件(*.xls)|*.xls|Excel2007文件(*.xlsx)|*.xlsx";
            ofd.ValidateNames = true;
            ofd.CheckFileExists = true;
            ofd.CheckPathExists = true;
            string strName = string.Empty;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                strName = ofd.FileName;
            }
            if (strName == "")
            {
                XtraMessageBox.Show("没有选择Excel文件！无法进行数据导入");
                return;
            }
            else
            {
                try
                {
                    DataSet myDs = new DataSet();
                    string text = string.Format("Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = '{0}';Extended Properties=Excel 8.0", strName);
                    string excelFirstTableName = GetExcelFirstTableName(text);
                    myDs.Tables.Clear();
                    myDs.Clear();
                    this.gridControl1.DataSource = null;
                    OleDbConnection selectConnection = new OleDbConnection(text);
                    OleDbDataAdapter oleDbDataAdapter = new OleDbDataAdapter(string.Format("select * from [{0}]", excelFirstTableName), selectConnection);
                    oleDbDataAdapter.Fill(myDs);
                    this.gridControl1.DataSource = myDs.Tables[0];
                    this.gridView1.PopulateColumns();
                }
                catch (Exception ex)
                {
                    XtraMessageBox.Show("从电子表格文件中装载数据异常！", ex.Message);
                }
            }
        }

        /// <summary>
        /// 返回Excel第一个工作表表名
        /// </summary>
        /// <param name="connectstring">excel连接字符串</param>
        /// <returns></returns>
        public static string GetExcelFirstTableName(string connectstring)
        {
            using (OleDbConnection connection = new OleDbConnection(connectstring))
            {
                string tableName = string.Empty;
                if (connection.State == ConnectionState.Closed)
                    connection.Open();
                DataTable dt = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                if (dt != null && dt.Rows.Count > 0)
                {
                    tableName = ConvertTo<string>(dt.Rows[0][2]);
                }
                return tableName;
            }
        }

        /// <summary>
        /// 将数据转换为指定类型
        /// </summary>
        /// <typeparam name="T">转换的目标类型</typeparam>
        /// <param name="data">转换的数据</param>
        public static T ConvertTo<T>(object data)
        {
            if (data == null || Convert.IsDBNull(data))
                return default(T);

            object obj = ConvertTo(data, typeof(T));
            if (obj == null)
            {
                return default(T);
            }
            return (T)obj;
        }

        /// <summary>
        /// 将数据转换为指定类型
        /// </summary>
        /// <param name="data">转换的数据</param>
        /// <param name="targetType">转换的目标类型</param>
        public static object ConvertTo(object data, Type targetType)
        {
            if (data == null || Convert.IsDBNull(data))
            {
                return null;
            }
            Type type2 = data.GetType();
            if (targetType == type2)
            {
                return data;
            }
            if (((targetType == typeof(Guid)) || (targetType == typeof(Guid?))) && (type2 == typeof(string)))
            {
                if (string.IsNullOrEmpty(data.ToString()))
                {
                    return null;
                }
                return new Guid(data.ToString());
            }
            if (targetType.IsEnum)
            {
                try
                {
                    return Enum.Parse(targetType, data.ToString(), true);
                }
                catch
                {
                    return Enum.ToObject(targetType, data);
                }
            }
            if (targetType.IsGenericType)
            {
                targetType = targetType.GetGenericArguments()[0];
            }
            return Convert.ChangeType(data, targetType);
        }