视频教程：小型登陆系统（三）

管理员登陆视图

 

v这里使用Membership.GetAllUsers();获取用户数据。

v查找用户使用Membership.FindUsersByName(SearchName);方法。

v删除用户使用Membership.DeleteUser(userName)方法。

v认定一个用户为管理员，不能删除管理员。

 

管理员视图代码：

 

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

namespace RegeditOfAdoDotnet

{

    public partial class AdminInfo : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            Response.Buffer = true;

            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);

            Response.Expires = 0;

            Response.CacheControl = "no-cache";

            Response.AddHeader("Pragma", "No-Cache");

            databind();//提取方法

        }

        /// <summary>

        /// 数据绑定

        /// </summary>

        protected void databind()

        {

            gvUserList.DataSource = Membership.GetAllUsers();//获取用户信息数据源

            gvUserList.DataBind();//数据绑定

        }

        /// <summary>

        /// 退出

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void btnExit_Click(object sender, EventArgs e)

        {

            Session.Clear();

            FormsAuthentication.SignOut();

            Response.Redirect("~/Goodby.aspx");

        }

        /// <summary>

        ///跳转到“添加用户”页面

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void btnAddUser_Click(object sender, EventArgs e)

        {

            Response.Redirect("~/Admin/AdminAddUser.aspx");

        }

        /// <summary>

        /// 查找用户

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void btnFindUserName_Click(object sender, EventArgs e)

        {

            try

            {

                if (!string.IsNullOrEmpty(txtUserName.Text.ToString()))

                {

                    MembershipUserCollection col = Membership.FindUsersByName(txtUserName.Text);

                    if (col.Count > 0)

                    {

                        //用户存在处理

                        gvUserList.DataSource = col;//获取用户信息数据源

                        gvUserList.DataBind();//数据绑定

                    }

                    else

                    {

                        ClientScript.RegisterStartupScript(this.GetType(), "myscript", "<script>alert('您要查找的用户不存在，请检查用户名！');</script>");

                    }

                }

            }

            catch (Exception exp)

            {

                //捕获异常

                Response.Write(exp.Message); //输出错误信息

            }

        }

        /// <summary>

        /// 取消查找

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void btnUndoFind_Click(object sender, EventArgs e)

        {

            txtUserName.Text = "";

            Response.Redirect("~/Admin/AdminInfo.aspx");

        }

        /// <summary>

        /// 分页

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void gv_PageIndexChanging(object sender, GridViewPageEventArgs e)

        {

            gvUserList.PageIndex = e.NewPageIndex;

            gvUserList.DataSource = Membership.GetAllUsers(); //数据源

            gvUserList.DataBind();

        }

        /// <summary>

        /// 删除

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void gv_RowDeleting(object sender, GridViewDeleteEventArgs e)

        {

            Label lblUserName = gvUserList.Rows[e.RowIndex].FindControl("lblUserName") as Label;

            if (Roles.IsUserInRole(lblUserName.Text, "Admin"))

            {

                ClientScript.RegisterStartupScript(this.GetType(), "myscript", "<script>alert('" + lblUserName.Text.ToString() + "是管理员，不能删除！');</script>");

            }

            else

            {

                Membership.DeleteUser(lblUserName.Text);

                Response.Redirect("~/Admin/AdminInfo.aspx");

            }

        }

        /// <summary>

        /// 分配角色和编辑

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void gvUserList_RowDataBound(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate))

            {

                Label lblUserName = e.Row.FindControl("lblUserName") as Label;

                HyperLink hylEidt = e.Row.FindControl("hylEidt") as HyperLink;

                HyperLink hylRole = e.Row.FindControl("hylRole") as HyperLink;

                hylEidt.NavigateUrl = "~/Admin/AdminModifyUser.aspx?user=" + lblUserName.Text.ToString();

                hylRole.NavigateUrl = "~/Admin/AdminAllocateRole.aspx?user=" + lblUserName.Text.ToString();

            }

        }

    }

}