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一、存储值
eg:登录一个页面，在进入这个页面之前你怎么知道它登没登录呢？[在登录成功之后我们把状态保存起来]
存储值得方式有两种，一种是cookie，一种是session
1.1区别:
代码：
if (SqlHelper.Exists(sSql, para)) { //cookie保存状态 if (chkRPwd.Checked) { Response.Cookies["name"].Expires = DateTime.Now.AddMinutes(1);//设置过期时间 //删除cookie //Response.Cookies.Clear(); } Response.Cookies["name"].Value = username; Response.Redirect("HomeAdoSqlHelper.aspx"); } else { Response.Write("<script>alert(‘密码错误！‘);</script>"); } }
1 if (SqlHelper.Exists(sSql, para)) 2 { 3 //把session保存安全系数高的东西,保存于浏览器缓存里 4 Session["name"] = username; 5 Response.Redirect("HomeAdoSqlHelper.aspx"); 6 } 7 else 8 { 9 Response.Write("<script>alert(‘密码错误！‘);</script>"); 10 } 11 }
1 protected void Page_Load(object sender, EventArgs e) 2 { 3 //cookie获取状态 4 if (Request.Cookies["name"] == null) 5 { 6 Response.Redirect("loginSqlHelper.aspx"); 7 } 8 if (!(IsPostBack)) 9 { 10 BindUserInfor(); 11 } 12 }
1 protected void Page_Load(object sender, EventArgs e) 2 { 3 //session 4 if (Session["name"] == null) 5 { 6 Response.Redirect("loginSqlHelper.aspx"); 7 } 8 if (!(IsPostBack)) 9 { 10 BindUserInfor(); 11 } 12 }
二、sqlHelper做增删改查,SQL注入处理[后台绑定下拉一定要对应]
1 <form id="form1" runat="server"> 2 <div> 3 <table> 4 <tr> 5 <td> 用户名:</td> 6 <td> 7 <asp:TextBox ID="txtSUserName" runat="server"></asp:TextBox> 8 </td> 9 <td>班级：</td> 10 <td> 11 <asp:DropDownList ID="ddlselPhase" runat="server"> 12 <asp:ListItem>---请选择---</asp:ListItem> 13 <asp:ListItem>.NET高级班01期</asp:ListItem> 14 <asp:ListItem>.NET高级班02期</asp:ListItem> 15 <asp:ListItem>.NET讲师</asp:ListItem> 16 <asp:ListItem>.NET网站开发01期</asp:ListItem> 17 <asp:ListItem>.NET网站开发02期</asp:ListItem> 18 <asp:ListItem>.NET网站开发03期</asp:ListItem> 19 <asp:ListItem>.NET网站开发04期</asp:ListItem> 20 <asp:ListItem>.NET网站开发05期</asp:ListItem> 21 <asp:ListItem>.NET网站开发06期</asp:ListItem> 22 <asp:ListItem>.NET网站开发07期</asp:ListItem> 23 <asp:ListItem>.NET网站开发08期</asp:ListItem> 24 <asp:ListItem>.NET网站开发09期</asp:ListItem> 25 <asp:ListItem>.NET网站开发10期</asp:ListItem> 26 <asp:ListItem>.NET网站开发11期</asp:ListItem> 27 <asp:ListItem>.NET网站开发12期</asp:ListItem> 28 <asp:ListItem>.NET网站开发13期</asp:ListItem> 29 <asp:ListItem>.NET网站开发14期</asp:ListItem> 30 <asp:ListItem>.NET网站开发15期</asp:ListItem> 31 <asp:ListItem>.NET网站开发16期</asp:ListItem> 32 <asp:ListItem>java第一期</asp:ListItem> 33 <asp:ListItem>JAVA讲师</asp:ListItem> 34 <asp:ListItem>ps设计01期</asp:ListItem> 35 <asp:ListItem>ps设计02期</asp:ListItem> 36 <asp:ListItem>ps设计03期</asp:ListItem> 37 <asp:ListItem>网页前端01期</asp:ListItem> 38 </asp:DropDownList> 39 </td> 40 <td> 41 <asp:Button ID="btnSel" runat="server" Text="查询" OnClick="btnSel_Click" style="height: 21px" /> 42 </td> 43 </tr> 44 </table> 45 </div> 46 <div> 47 <table> 48 <tr> 49 <td> 用户名:</td> 50 <td> 51 <asp:TextBox ID="txtAddUserName" runat="server"></asp:TextBox> 52 </td> 53 <td> 密码:</td> 54 <td> 55 <asp:TextBox ID="txtAddPwd" runat="server" TextMode="Password"></asp:TextBox> 56 </td> 57 <td> QQ:</td> 58 <td> 59 <asp:TextBox ID="txtAddQq" runat="server"></asp:TextBox> 60 </td> 61 <td>班级：</td> 62 <td> 63 <asp:DropDownList ID="ddlAddPhase" runat="server"> 64 <asp:ListItem>---请选择---</asp:ListItem> 65 <asp:ListItem>.NET高级班01期</asp:ListItem> 66 <asp:ListItem>.NET高级班02期</asp:ListItem> 67 <asp:ListItem>.NET讲师</asp:ListItem> 68 <asp:ListItem>.NET网站开发01期</asp:ListItem> 69 <asp:ListItem>.NET网站开发02期</asp:ListItem> 70 <asp:ListItem>.NET网站开发03期</asp:ListItem> 71 <asp:ListItem>.NET网站开发04期</asp:ListItem> 72 <asp:ListItem>.NET网站开发05期</asp:ListItem> 73 <asp:ListItem>.NET网站开发06期</asp:ListItem> 74 <asp:ListItem>.NET网站开发07期</asp:ListItem> 75 <asp:ListItem>.NET网站开发08期</asp:ListItem> 76 <asp:ListItem>.NET网站开发09期</asp:ListItem> 77 <asp:ListItem>.NET网站开发10期</asp:ListItem> 78 <asp:ListItem>.NET网站开发11期</asp:ListItem> 79 <asp:ListItem>.NET网站开发12期</asp:ListItem> 80 <asp:ListItem>.NET网站开发13期</asp:ListItem> 81 <asp:ListItem>.NET网站开发14期</asp:ListItem> 82 <asp:ListItem>ps设计01期</asp:ListItem> 83 <asp:ListItem>ps设计03期</asp:ListItem> 84 <asp:ListItem>网页前端01期</asp:ListItem> 85 </asp:DropDownList> 86 </td> 87 <td> 88 <asp:Button ID="btnAdd" runat="server" Text="添加" OnClick="btnAdd_Click" /> 89 </td> 90 </tr> 91 </table> 92 </div> 93 <div> 94 <table> 95 <tr> 96 <td>用户ID:</td> 97 <td> 98 <asp:TextBox ID="txtDUId" runat="server"></asp:TextBox> 99 </td> 100 <td> 101 <asp:Button ID="btnD" runat="server" Text="删除" OnClick="btnD_Click" /> 102 </td> 103 </tr> 104 </table> 105 </div> 106 <%--<div> 107 <table> 108 <tr> 109 <td>ID:</td> 110 <td> 111 <asp:TextBox ID="txtUId" runat="server"></asp:TextBox> 112 </td> 113 <td> 114 <asp:TextBox ID="txtUUserName" runat="server"></asp:TextBox> 115 </td> 116 <td> 117 <asp:Button ID="btnU" runat="server" Text="更新" OnClick="btnU_Click" /> 118 </td> 119 </tr> 120 </table> 121 </div>--%> 122 <div> 123 <table> 124 <tr> 125 <td>ID:</td> 126 <td> 127 <asp:TextBox ID="txtUuid" runat="server"></asp:TextBox> 128 </td> 129 <td> 130 <asp:TextBox ID="txtUuserName2" runat="server"></asp:TextBox> 131 </td> 132 <td> 133 <asp:Button ID="btnU2" runat="server" Text="更新" OnClick="btnU2_Click"/> 134 </td> 135 </tr> 136 </table> 137 </div> 138 <div class="dItem"> 139 <table> 140 <tr> 141 <td> 142 <asp:Button ID="btnDelAll" runat="server" Text="批量删除" OnClick="btnDelAll_Click" OnClientClick="return confirm(‘你确定删除吗？‘);"/> 143 </td> 144 <td> 145 <asp:Button ID="btnUpAll" runat="server" Text="批量修改" OnClick="btnUpAll_Click" /> 146 </td> 147 <td> 148 <asp:Button ID="btnAllAdd" runat="server" Text="添加" OnClick="btnAllAdd_Click"/> 149 </td> 150 </tr> 151 </table> 152 </div> 153 <div> 154 <asp:GridView ID="GriVShow" runat="server" AutoGenerateColumns="False" OnRowDataBound="GriVShow_RowDataBound"> 155 <Columns> 156 <asp:TemplateField> 157 <HeaderTemplate> 158 <asp:CheckBox ID="chkAll" runat="server" AutoPostBack="True" OnCheckedChanged="chkAll_CheckedChanged" /> 159 </HeaderTemplate> 160 <ItemTemplate> 161 <asp:CheckBox ID="chkItem" runat="server" /> 162 </ItemTemplate> 163 </asp:TemplateField> 164 <asp:BoundField DataField="Userid" HeaderText="ID" /> 165 <asp:BoundField DataField="UserName" HeaderText="用户名：" /> 166 <asp:BoundField DataField="phonenum" HeaderText="电话号码" /> 167 <asp:BoundField DataField="qq" HeaderText="QQ" /> 168 <asp:BoundField DataField="phase" HeaderText="班级" /> 169 <asp:BoundField DataField="CreatedTime" HeaderText="创建时间" /> 170 <asp:TemplateField HeaderText="用户名"> 171 <ItemTemplate> 172 <asp:TextBox ID="txtgvUserName" runat="server" Text=‘<%#Eval("UserName")%>‘></asp:TextBox> 173 </ItemTemplate> 174 </asp:TemplateField> 175 <asp:TemplateField HeaderText="密码"> 176 <ItemTemplate> 177 <asp:TextBox ID="txtgvPwd" runat="server" Text=‘<%#Eval("Pwd")%>‘></asp:TextBox> 178 </ItemTemplate> 179 </asp:TemplateField> 180 <asp:TemplateField HeaderText="QQ"> 181 <ItemTemplate> 182 <asp:TextBox ID="txtgvQq" runat="server" Text=‘<%#Eval("QQ")%>‘></asp:TextBox> 183 </ItemTemplate> 184 </asp:TemplateField> 185 <asp:TemplateField HeaderText="班级"> 186 <ItemTemplate> 187 <asp:DropDownList ID="ddlgvPhase" runat="server" ToolTip=‘<%#Eval("phase")%>‘> 188 <asp:ListItem>---请选择---</asp:ListItem> 189 <asp:ListItem>.NET高级班01期</asp:ListItem> 190 <asp:ListItem>.NET高级班02期</asp:ListItem> 191 <asp:ListItem>.NET讲师</asp:ListItem> 192 <asp:ListItem>.NET网站开发01期</asp:ListItem> 193 <asp:ListItem>.NET网站开发02期</asp:ListItem> 194 <asp:ListItem>.NET网站开发03期</asp:ListItem> 195 <asp:ListItem>.NET网站开发04期</asp:ListItem> 196 <asp:ListItem>.NET网站开发05期</asp:ListItem> 197 <asp:ListItem>.NET网站开发06期</asp:ListItem> 198 <asp:ListItem>.NET网站开发07期</asp:ListItem> 199 <asp:ListItem>.NET网站开发08期</asp:ListItem> 200 <asp:ListItem>.NET网站开发09期</asp:ListItem> 201 <asp:ListItem>.NET网站开发10期</asp:ListItem> 202 <asp:ListItem>.NET网站开发11期</asp:ListItem> 203 <asp:ListItem>.NET网站开发12期</asp:ListItem> 204 <asp:ListItem>.NET网站开发13期</asp:ListItem> 205 <asp:ListItem>.NET网站开发14期</asp:ListItem> 206 <asp:ListItem>ps设计01期</asp:ListItem> 207 <asp:ListItem>ps设计03期</asp:ListItem> 208 <asp:ListItem>网页前端01期</asp:ListItem> 209 </asp:DropDownList> 210 </ItemTemplate> 211 </asp:TemplateField> 212 <asp:TemplateField HeaderText="详情"> 213 <ItemTemplate> 214 <a href="UserInforManagerContext.aspx?Id=<%#Eval("UserId")%>">详情</a> 215 </ItemTemplate> 216 </asp:TemplateField> 217 </Columns> 218 </asp:GridView> 219 </div> 220 </form>
1 namespace sqlHelperStudy2160907 2 { 3 public partial class HomeAdoSqlHelperFirst : System.Web.UI.Page 4 { 9 SqlParameter[] para=new SqlParameter[2]; 10 protected void Page_Load(object sender, EventArgs e) 11 { 12 if (!(IsPostBack)) 13 { 14 BindUserInfor(); 15 } 16 } 17 public void BindUserInfor() 18 { 19 try 20 { 21 DataTable dt = SqlHelper.ExecuteDataSetText(GetSql(), para).Tables[0]; 22 GriVShow.DataSource = dt; 23 GriVShow.DataBind(); 24 } 25 catch (Exception ex) 26 { 27 Response.Write("<script>alret(‘系统正在维护，请联系管理员!‘);</script>"); 28 } 29 } 30 public string GetSql() 31 { 32 StringBuilder sb = new StringBuilder(); 33 //sb.Append("select Userid,UserName,phonenum,sex,phase,qq,Message,HeadPic,CreatedTime from UserInfor where 1=1"); 34 sb.Append("select top 100 * from UserInfor where 1=1 "); 35 if (!string.IsNullOrEmpty(txtSUserName.Text.Trim())) 36 { 37 //sb.Append(string.Format("and UserName=‘{0}‘", txtSUserName.Text.Trim())); 38 sb.Append("and UserName=@UserName"); 39 para[0] = new SqlParameter("@UserName",txtSUserName.Text.Trim()); 40 } 41 if (ddlselPhase.SelectedIndex > 0) 42 { 43 sb.Append("and phase=@phase"); 44 para[1] = new SqlParameter("@phase",ddlselPhase.SelectedValue); 45 //sb.Append(string.Format("and phase=‘{0}‘", ddlselPhase.SelectedValue)); 46 } 47 return sb.ToString(); 48 } 49 50 protected void btnSel_Click(object sender, EventArgs e) 51 { 52 BindUserInfor(); 53 } 54 55 protected void chkAll_CheckedChanged(object sender, EventArgs e) 56 { 57 //1.当我们点击按钮时，去找chkAll它的事件源的对象把它变成checkBox 58 CheckBox chkAll = sender as CheckBox; 59 //2.对它的每一行进行遍历循环 60 foreach (GridViewRow gvr in GriVShow.Rows) 61 { 62 //2.1获得到第一行的第一列，找到每一列id等于chkitem的对象把它变成checkbox 63 CheckBox chkItem = gvr.Cells[0].FindControl("chkItem") as CheckBox; 64 //2.2让它当前全选的checked属性等于下面每一行的属性，选中就为true，没选就为Fulse 65 chkItem.Checked = chkAll.Checked; 66 } 67 } 68 protected void GriVShow_RowDataBound(object sender, GridViewRowEventArgs e) 69 { 70 if (e.Row.RowType == DataControlRowType.DataRow) 71 { 72 DropDownList ddlphase = e.Row.FindControl("ddlgvPhase") as DropDownList; 73 string phase = ddlphase.ToolTip; 74 if (!string.IsNullOrEmpty(phase)) 75 { 76 ddlphase.ClearSelection(); 77 ddlphase.Items.FindByValue(phase).Selected = true; 78 } 79 } 80 } 81 82 protected void btnAdd_Click(object sender, EventArgs e) 83 { 84 string username = txtAddUserName.Text.Trim(); 85 string pwd = txtAddPwd.Text.Trim(); 86 string qq = txtAddQq.Text.Trim(); 87 string phase = ddlAddPhase.SelectedIndex > 0 ? ddlAddPhase.SelectedValue : ""; 88 if (!string.IsNullOrEmpty(username)) 89 { 90 string sSql = string.Format("insert into UserInfor(UserName,Pwd,QQ,Phase)values(@UserName,@Pwd,@QQ,@Phase)"); 91 SqlParameter[] paraA = new SqlParameter[] 92 { 93 new SqlParameter("@UserName",username), 94 new SqlParameter("@Pwd",pwd), 95 new SqlParameter("@QQ",qq), 96 new SqlParameter("@Phase",phase) 97 }; 98 SqlHelper.ExecteNonQueryText(sSql, paraA); 99 BindUserInfor(); 100 } 101 } 102 public void Del(int UserId) 103 { 104 try 105 { 106 //string ssql = string.Format("select UserId from UserInfor where UserId=‘{0}‘", UserId); 107 string ssql = "select UserId from UserInfor where UserId=@UserId"; 108 SqlParameter[] paraD = new SqlParameter[] { new SqlParameter("@UserId", UserId) }; 109 if(SqlHelper.Exists(ssql,paraD)) 110 { 111 string sSql1 = string.Format("delete UserInfor where UserId=@UserId"); 112 if(SqlHelper.ExecteNonQueryText(sSql1,paraD)>0) 113 { 114 Response.Write("<script>alert(‘删除成功！‘);</script>"); 115 } 116 BindUserInfor(); 117 } 118 else 119 { 120 Response.Write("该用户不存在！"); 121 } 122 } 123 catch (Exception ex) 124 { 125 Response.Write("<script>alret(‘系统正在维护，请联系管理员!‘);</script>"); 126 } 127 } 128 protected void btnD_Click(object sender, EventArgs e) 129 { 130 int UserId = txtDUId.Text.Trim() == "" ? 0 : Convert.ToInt32(txtDUId.Text.Trim()); 131 Del(UserId); 132 BindUserInfor(); 133 } 134 135 protected void btnU2_Click(object sender, EventArgs e) 136 { 137 int Uid2 = txtUuid.Text.Trim() == "" ? 0 : Convert.ToInt32(txtUuid.Text.Trim()); 138 string uusername2 = txtUuserName2.Text.Trim(); 139 try 140 { 141 string sSql = string.Format("select count(*) from UserInfor where UserId=@UserId"); 142 SqlParameter[] paraU = new SqlParameter[] { new SqlParameter("@UserId", Uid2) }; 143 int icount = Convert.ToInt32(SqlHelper.ExecuteScalar(CommandType.Text,sSql,paraU)); 144 if (icount > 0) 145 { 146 string sSql1 = string.Format("update UserInfor set UserName=@UserName where UserId=@UserId"); 147 //string ssql1 = "update UserInfor set UserName=@UserName where UserId=@UserId"; 148 SqlParameter[] paraU1 = new SqlParameter[] 149 { 150 new SqlParameter("@UserName",uusername2), 151 new SqlParameter("@UserId",Uid2) 152 }; 153 if (SqlHelper.ExecteNonQueryText(sSql1,paraU1)>0) 154 { 155 Response.Write("<script>alert(‘数据更新成功！‘);</script>"); 156 } 157 BindUserInfor(); 158 } 159 else 160 { 161 Response.Write("该用户不存在！"); 162 } 163 } 164 catch (Exception ex) 165 { 166 Response.Write("<script>alret(‘系统正在维护，请联系管理员!‘);</script>"); 167 } 168 } 169 170 protected void btnDelAll_Click(object sender, EventArgs e) 171 { 172 foreach (GridViewRow gvr in GriVShow.Rows) 173 { 174 int UserId = Convert.ToInt32(gvr.Cells[1].Text); 175 CheckBox chkItem = gvr.Cells[0].FindControl("chkItem") as CheckBox; 176 if (chkItem.Checked) 177 { 178 Del(UserId); 179 } 180 } 181 BindUserInfor(); 182 } 183 184 public void UpUser(int UserId, string UserName, string Pwd, string qq, string phase) 185 { 186 try 187 { 188 string sSql = string.Format("update UserInfor set UserName=@UserName,Pwd=@Pwd,QQ=@QQ,Phase=@Phase where UserId=@UserId"); 189 SqlParameter[] paraAll = new SqlParameter[] 190 { 191 new SqlParameter("@UserName",UserName), 192 new SqlParameter("@Pwd",Pwd), 193 new SqlParameter("@qq",qq), 194 new SqlParameter("@Phase",phase), 195 new SqlParameter("@UserId",UserId) 196 }; 197 if (SqlHelper.ExecteNonQueryText(sSql, paraAll) > 0) 198 { 199 Response.Write("<script>alert(‘数据更新成功！‘);</script>"); 200 } 201 } 202 catch (Exception) 203 { 204 Response.Write("网页正在维护!"); 205 } 206 } 207 protected void btnUpAll_Click(object sender, EventArgs e) 208 { 209 foreach (GridViewRow gvr in GriVShow.Rows) 210 { 211 int UserId = Convert.ToInt32(gvr.Cells[1].Text); 212 CheckBox chkItem = gvr.Cells[0].FindControl("chkItem") as CheckBox; 213 if (chkItem.Checked) 214 { 215 TextBox txtUserName = gvr.Cells[7].FindControl("txtgvUserName") as TextBox; 216 TextBox txtPwd = gvr.Cells[8].FindControl("txtgvPwd") as TextBox; 217 TextBox txtqq = gvr.Cells[9].FindControl("txtgvQq") as TextBox; 218 DropDownList ddlphase = gvr.Cells[10].FindControl("ddlgvPhase") as DropDownList; 219 UpUser(UserId, txtUserName.Text.Trim(),txtPwd.Text.Trim(), txtqq.Text.Trim(), ddlphase.SelectedValue); 220 } 221 } 222 BindUserInfor(); 223 } 224 225 protected void btnAllAdd_Click(object sender, EventArgs e) 226 { 227 try 228 { 229 string sSql = string.Format("insert into UserInfor (Phase,CreatedTime) values(@Phase,@CreatedTime)"); 230 SqlParameter[] paraAdd = new SqlParameter[] 231 { 232 new SqlParameter("@Phase","网页前端01期"), 233 new SqlParameter("@CreatedTime",DateTime.Now.ToString()) 234 }; 235 SqlHelper.ExecteNonQueryText(sSql, paraAdd); 236 BindUserInfor(); 237 } 238 catch (Exception) 239 { 240 Response.Write("网页正在维护!"); 241 } 242 } 243 } 244 }
三、post传值:
postProject.aspx
1 <form id="form1" action="PostProjectT.aspx" method="post"> 2 <table> 3 <tr> 4 <td><input type="text" name="UserName"/></td> 5 </tr> 6 <tr> 7 <td><input type="password" name="Pwd"/></td></tr> 8 <tr> 9 <td><input type="submit"value="提交"/></td> 10 </tr> 11 </table> 12 </form>
PostProjectT.aspx.cs
1 protected void Page_Load(object sender, EventArgs e) 2 { 3 //获取到用户名和密码 4 string username = Request.Form["UserName"].ToString(); 5 string pwd = Request.Form["Pwd"].ToString(); 6 //把用户名和密码返回回去 7 Response.Write(username+"-"+pwd); 8 }
sqlHelper做增删改查,SQL注入处理，存储值，cookie，session
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原文地址：http://www.cnblogs.com/wangwangwangMax/p/5881324.html
