简化代码

UAS_MES_NEW/DataOperate/DataHelper.cs

@@ -1,8 +1,6 @@
 using Oracle.ManagedDataAccess.Client;
 using System;
-using System.Collections;
 using System.Collections.Generic;
-using System.Configuration;
 using System.Data;
 using System.Text;
 using UAS_MES_NEW.PublicMethod;

UAS_MES_NEW/DataOperate/ExcelHandler.cs

@@ -148,7 +148,6 @@ namespace UAS_MES_NEW.DataOperate
         {
             StreamWriter sr;
             string filePath = @FolderPath;
-            string report;
             if (File.Exists(filePath + "\\" + FileName))   //如果文件存在,则创建File.AppendText对象   
             {
                 File.Delete(filePath + "\\" + FileName);
@@ -158,7 +157,7 @@ namespace UAS_MES_NEW.DataOperate
             string Title = "";
             foreach (DataColumn dc in dt.Columns)
             {
-                Title += String.Format("{0,10}", dc.ColumnName.ToString());
+                Title += string.Format("{0,10}", dc.ColumnName.ToString());
             }
             sr.WriteLine(Title + "\r");
             foreach (DataRow dr in dt.Rows)