改了也不好使，不知道咋了版。

source/BooksManageSystem.csproj

@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>BooksManageSystem</RootNamespace>
     <AssemblyName>BooksManageSystem</AssemblyName>
-    <TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <IsWebBootstrapper>false</IsWebBootstrapper>
     <TargetFrameworkProfile>
@@ -53,6 +53,10 @@
   <PropertyGroup>
     <ApplicationIcon>bookcase.ico</ApplicationIcon>
   </PropertyGroup>
+  <PropertyGroup>
+    <StartupObject>
+    </StartupObject>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="EPPlus">
       <HintPath>.\EPPlus.dll</HintPath>

source/DBHelper.cs

@@ -19,7 +19,6 @@ namespace BooksManageSystem
         //OleDbCommand comm = new OleDbCommand();
         public static DataTable ExecuteDataTable(OleDbCommand comm)
         {
-            
             using (OleDbConnection conn = new OleDbConnection(conStr))
             {
                 comm.Connection = conn;

source/DBcon.cs

@@ -142,8 +142,12 @@ namespace BooksManageSystem
                 throw new Exception("没有足够数量的书可供领取!");
             }
 
-            using (OleDbCommand comm = new OleDbCommand(@"update books set books_count = " + (c - count).ToString() + " where id = " + id.ToString()))
+            using (OleDbCommand comm = new OleDbCommand(@"update books set books_count = @ccount where id = @id"))
             {
+
+                comm.Parameters.AddWithValue("@ccount", c - count);
+                comm.Parameters.AddWithValue("@id", id);
+
                 DBHelper.ExecuteNonQuery(comm);
             }
 
@@ -177,8 +181,11 @@ namespace BooksManageSystem
         public int PurchaseBook(int id, int count, string oper, DateTime time, int bid)
         {
             int c = queryCountByID(id);
-            using (OleDbCommand comm = new OleDbCommand(@"update books set books_count = " + (c + count).ToString() + " where id = " + id.ToString()))
+            using (OleDbCommand comm = new OleDbCommand(@"update books set books_count = @books_count where id = @id"))
             {
+                comm.Parameters.AddWithValue("@books_count", c + count);
+                comm.Parameters.AddWithValue("@id", id);
+
                 DBHelper.ExecuteNonQuery(comm);
             }
 
@@ -259,8 +266,10 @@ namespace BooksManageSystem
         //查询书的数量OK
         private int queryCountByID(int id )
         {
-            using (OleDbCommand comm = new OleDbCommand(@"select books_count from books where id = " + id))
+            using (OleDbCommand comm = new OleDbCommand(@"select books_count from books where id = @id"))
             {
+
+                comm.Parameters.AddWithValue("@id", id);
                 return Convert.ToInt32(DBHelper.ExecuteScalar(comm));
             }
         }

source/Form1.Designer.cs

@@ -48,6 +48,7 @@
             this.menu_ExcelOutBookList = new System.Windows.Forms.ToolStripMenuItem();
             this.销售统计ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.menu_TotalSell = new System.Windows.Forms.ToolStripMenuItem();
+            this.menu_TotalOut = new System.Windows.Forms.ToolStripMenuItem();
             this.初始化ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.menu_init = new System.Windows.Forms.ToolStripMenuItem();
             this.toolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
@@ -74,7 +75,7 @@
             this.btn_out_Give_booklist = new System.Windows.Forms.Button();
             this.btn_BuyListQuery = new System.Windows.Forms.Button();
             this.btn_OPLOGALL = new System.Windows.Forms.Button();
-            this.menu_TotalOut = new System.Windows.Forms.ToolStripMenuItem();
+            this.button1 = new System.Windows.Forms.Button();
             this.menuStrip1.SuspendLayout();
             this.pl_BtnPlanel.SuspendLayout();
             this.SuspendLayout();
@@ -108,33 +109,33 @@
             // menu_BUYBOOK
             // 
             this.menu_BUYBOOK.Name = "menu_BUYBOOK";
-            this.menu_BUYBOOK.Size = new System.Drawing.Size(152, 22);
+            this.menu_BUYBOOK.Size = new System.Drawing.Size(140, 22);
             this.menu_BUYBOOK.Text = "批量购书(&P)";
             this.menu_BUYBOOK.Click += new System.EventHandler(this.menu_BUYBOOK_Click);
             // 
             // menu_RETURNBOOK
             // 
             this.menu_RETURNBOOK.Name = "menu_RETURNBOOK";
-            this.menu_RETURNBOOK.Size = new System.Drawing.Size(152, 22);
+            this.menu_RETURNBOOK.Size = new System.Drawing.Size(140, 22);
             this.menu_RETURNBOOK.Text = "归还书籍(&R)";
             this.menu_RETURNBOOK.Click += new System.EventHandler(this.menu_RETURNBOOK_Click);
             // 
             // toolStripSeparator1
             // 
             this.toolStripSeparator1.Name = "toolStripSeparator1";
-            this.toolStripSeparator1.Size = new System.Drawing.Size(149, 6);
+            this.toolStripSeparator1.Size = new System.Drawing.Size(137, 6);
             // 
             // menu_SELLBOOK
             // 
             this.menu_SELLBOOK.Name = "menu_SELLBOOK";
-            this.menu_SELLBOOK.Size = new System.Drawing.Size(152, 22);
+            this.menu_SELLBOOK.Size = new System.Drawing.Size(140, 22);
             this.menu_SELLBOOK.Text = "销售书籍(&S)";
             this.menu_SELLBOOK.Click += new System.EventHandler(this.menu_SELLBOOK_Click);
             // 
             // menu_LINGQU
             // 
             this.menu_LINGQU.Name = "menu_LINGQU";
-            this.menu_LINGQU.Size = new System.Drawing.Size(152, 22);
+            this.menu_LINGQU.Size = new System.Drawing.Size(140, 22);
             this.menu_LINGQU.Text = "领取书籍(&E)";
             this.menu_LINGQU.Click += new System.EventHandler(this.menu_LINGQU_Click);
             // 
@@ -230,6 +231,13 @@
             this.menu_TotalSell.Text = "导出Excel销售数据";
             this.menu_TotalSell.Click += new System.EventHandler(this.menu_TotalSell_Click);
             // 
+            // menu_TotalOut
+            // 
+            this.menu_TotalOut.Name = "menu_TotalOut";
+            this.menu_TotalOut.Size = new System.Drawing.Size(177, 22);
+            this.menu_TotalOut.Text = "导出Excel领取数据";
+            this.menu_TotalOut.Click += new System.EventHandler(this.menu_TotalOut_Click);
+            // 
             // 初始化ToolStripMenuItem
             // 
             this.初始化ToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
@@ -485,19 +493,23 @@
             this.btn_OPLOGALL.UseVisualStyleBackColor = false;
             this.btn_OPLOGALL.Click += new System.EventHandler(this.btn_OPLOGALL_Click);
             // 
-            // menu_TotalOut
+            // button1
             // 
-            this.menu_TotalOut.Name = "menu_TotalOut";
-            this.menu_TotalOut.Size = new System.Drawing.Size(177, 22);
-            this.menu_TotalOut.Text = "导出Excel领取数据";
-            this.menu_TotalOut.Click += new System.EventHandler(this.menu_TotalOut_Click);
+            this.button1.Location = new System.Drawing.Point(16, 413);
+            this.button1.Name = "button1";
+            this.button1.Size = new System.Drawing.Size(75, 23);
+            this.button1.TabIndex = 15;
+            this.button1.Text = "button1";
+            this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
             // 
             // Form1
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(250)))), ((int)(((byte)(252)))), ((int)(((byte)(241)))));
-            this.ClientSize = new System.Drawing.Size(784, 561);
+            this.ClientSize = new System.Drawing.Size(784, 562);
+            this.Controls.Add(this.button1);
             this.Controls.Add(this.listView1);
             this.Controls.Add(this.pl_BtnPlanel);
             this.Controls.Add(this.label2);
@@ -571,6 +583,7 @@
         private System.Windows.Forms.ToolStripMenuItem toolStripMenuItem2;
         private System.Windows.Forms.Button btn_out_Sell_List;
         private System.Windows.Forms.ToolStripMenuItem menu_TotalOut;
+        private System.Windows.Forms.Button button1;
     }
 }
 

source/Form1.cs

@@ -688,12 +688,16 @@ namespace BooksManageSystem
             {
                 MessageBox.Show("升级失败,可能已经升级过了。");
             }
-        } 
-        #endregion
+        }
 
 
 
 
+        #endregion
 
+        private void button1_Click(object sender, EventArgs e)
+        {
+            
+        }
     }
 }

source/app.config

@@ -1,3 +1,3 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
-<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/></startup></configuration>
+<startup><supportedRuntime version="v2.0.50727"/></startup></configuration>