请教输出DataTable到Excel的文件名是乱码以及输出记录的格式设置
输出Excel按钮事件：
private   void   OutToExcel_Lk_Click(object   sender,   System.EventArgs   e)
{
string   year   =   Year_DDL.SelectedItem.Value;
string   FileName   =   year   +   "年年度工作计划.xls ";
ExportDataGrid( "application/ms-excel ",FileName);
}
读取数据库记录到DataTable并输出：
private   void   ExportDataGrid(string   p_FileType,   string   p_FileName)  
{
string   sqlStr   =   "select   Convert(int,EveryYearID)   as   EveryYearID,isnull(Area, ' ')   as   Area,MapNo,MapName, '1: '+isnull(Scale, ' ')   as   Scale,SurveyQuality,isnull(SurveyCyc, ' ')   as   SurveyCyc,isnull(LastYear, ' ')   as   LastYear,isnull(LastSurveyQuality, ' ')   as   LastSurveyQuality,isnull(FactArea, ' ')   as   FactArea,isnull(ConvertArea, ' ')   as   ConvertArea,isnull(AssistantArea, ' ')   as   AssistantArea,isnull(TotalArea, ' ')   as   TotalArea,Case   SurveyFlag   when   '1 '   then   '是 '   when   '0 '   then   '否 '     end   as   SurveyFlag,isnull(PrintMap, ' ')   as   PrintMap,isnull(Rmk, ' ')   as   Rmk   from   TaskYearMng   order   by   EveryYearID   ";
string   connectString   =   ConfigurationSettings.AppSettings[ "DBConnection "];
SqlConnection   cn   =   new   SqlConnection(   connectString   );
SqlDataAdapter   da   =   new   SqlDataAdapter(   sqlStr,cn   );
da.Fill(dsInfo);

DataTable   dt   =   new   DataTable();

dt.Columns.Add( "序号 ");
dt.Columns.Add( "区域 ");
dt.Columns.Add( "图号 ");
dt.Columns.Add( "图名 ");
dt.Columns.Add( "比例尺 ");
dt.Columns.Add( "测量性质 ");
dt.Columns.Add( "测量周期(基/检) ");
dt.Columns.Add( "上次测量年份 ");
dt.Columns.Add( "上次测量性质 ");
dt.Columns.Add( "实测面积 ");
dt.Columns.Add( "折算面积 ");
dt.Columns.Add( "辅助面积 ");
dt.Columns.Add( "合计面积 ");
dt.Columns.Add( "多波束测量 ");
dt.Columns.Add( "印图 ");
dt.Columns.Add( "备注 ");

for   (int   i   =   0;   i   <   dsInfo.Tables[0].Rows.Count;   i++)
{
DataRow   dr   =   dt.NewRow();
string   num   =   dsInfo.Tables[0].Rows[i][0].ToString();
string   id   =   " ";
if(num.IndexOf( '- ')   >   -1)
{
string[]   nu   =   num.Split( '- ');
id   =   nu[0]   +   "-- "   +   nu[1];
}
else
{
id   =   num;
}
dr[0]   =   id;
dr[1]   =   dsInfo.Tables[0].Rows[i][1].ToString();
dr[2]   =   dsInfo.Tables[0].Rows[i][2].ToString();
dr[3]   =   dsInfo.Tables[0].Rows[i][3].ToString();
dr[4]   =   dsInfo.Tables[0].Rows[i][4].ToString();
dr[5]   =   dsInfo.Tables[0].Rows[i][5].ToString();
dr[6]   =   dsInfo.Tables[0].Rows[i][6].ToString();