视频教程：小型登陆系统（六）

管理员给用户分配角色

 

v   这里是分配用户角色左边是可分配的角色，右边是用户已有的角色。

v   通过按钮可将选择角色项在两个框中添加与移除，也可全部添加与移除，点击“确定”完成分配，点击“返回”回到用户列表

v   管理员不能被去掉管理员角色。

分配角色代码

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 AdminAllocateRole : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            string userName = Request.QueryString["user"].ToString();
            lblUserName.Text = userName;
            Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AddHeader("Pragma", "No-Cache");
            if (!IsPostBack)
            {
                RolesBind();//提取的RolesBind方法
            }
        }

        /// <summary>
        /// 分离出已有角色和可分角色
        /// </summary>
        private void RolesBind()
        {
            //获取AdminInfo.aspx 页面传递过来的用户名
            string userName = Request.QueryString["user"].ToString();
            lblUserName.Text = userName;
            MembershipUser user = Membership.GetUser(lblUserName.Text);//获取当前用户信息
            String[] roles = Roles.GetRolesForUser(userName);
            //获取当前用户的角色
            lbxHadRole.DataSource = roles;
            lbxHadRole.DataBind();
            string[] a = Roles.GetAllRoles();//获取所有用户角色
            string[] b = Roles.GetRolesForUser(userName);//获取可分角色
            string[] c = new string[a.Length - b.Length];//已有角色
            int k = 0;
            for (int i = 0; i < b.Length; i++)
            {
                for (int j = 0; j < a.Length; j++)
                {
                    if (a[j] == b[i])
                        a.SetValue("", j);
                }
            }
            for (int i = 0; i < a.Length; i++)
            {
                if (a[i] != "")
                {
                    c[k] = a[i];
                    k++;
                }
            }
            //获取可分角色列表
            lbxDivRole.DataSource = c;
            lbxDivRole.DataBind();
        }

        /// <summary>
        ///返回
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnBack_Click(object sender, EventArgs e)
        {
            Response.Redirect("~/Admin/AdminInfo.aspx");
        }

        /// <summary>
        /// 单个选中可分角色
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnInsRole_Click(object sender, EventArgs e)
        {
           
            try
            {
                if (lbxDivRole.GetSelectedIndices().Length > 0)
                {
                    lbxHadRole.Items.Add(lbxDivRole.SelectedItem);
                    lbxDivRole.Items.Remove(lbxDivRole.SelectedItem);
                }
            }
            catch (Exception exp)
            {
                //捕获异常
                Response.Write(exp.Message);
            }
        }

        /// <summary>
        /// 全部选中可分角色
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnInsAllRole_Click(object sender, EventArgs e)
        {
            try
            {
                if (lbxDivRole.GetSelectedIndices().Length > 0)
                {
                    ArrayList arrayItems = new ArrayList();
                    foreach (ListItem item in this.lbxDivRole.Items)
                    {
                        arrayItems.Add(item);
                    }
                    foreach (ListItem item in arrayItems)
                    {
                        this.lbxHadRole.Items.Add(item);
                        this.lbxDivRole.Items.Remove(item);
                    }
                }
            }
            catch (Exception exp)
            {
                //捕获异常
                Response.Write(exp.Message);
            }
        }

        /// <summary>
        /// 单个选中已有角色
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnDelRole_Click(object sender, EventArgs e)
        {
            try
            {
                if (lbxHadRole.GetSelectedIndices().Length > 0)
                {
                    if (lbxHadRole.SelectedItem.Value != "Admin")
                    {
                        lbxDivRole.Items.Add(lbxHadRole.SelectedItem);
                        lbxHadRole.Items.Remove(lbxHadRole.SelectedItem);
                    }
                    else
                    {
                        ClientScript.RegisterStartupScript(this.GetType(), "myscript", "<script>alert('管理员不能被去掉管理员角色！');</script>");
                    }
                }
            }
            catch (Exception exp)
            {
                //捕获异常
                Response.Write(exp.Message);
            }

        }

        /// <summary>
        /// 全部选中已有角色
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnDelAllRole_Click(object sender, EventArgs e)
        {
            try
            {
                if (lbxHadRole.GetSelectedIndices().Length > 0)
                {
                    ArrayList arrayItems = new ArrayList();
                    foreach (ListItem item in this.lbxHadRole.Items)
                    {
                        if (item.ToString() != "Admin")
                        {
                            arrayItems.Add(item);
                        }
                        else
                        {
                            ClientScript.RegisterStartupScript(this.GetType(), "myscript", "<script>alert('管理员不能被去掉管理员角色！');</script>");
                        }
                    }
                    foreach (ListItem item in arrayItems)
                    {
                        this.lbxDivRole.Items.Add(item);
                        this.lbxHadRole.Items.Remove(item);
                    }
                }
            }
            catch (Exception exp)
            {
                //捕获异常
                Response.Write(exp.Message);
            }
        }

        /// <summary>
        /// 确定
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnCofirm_Click(object sender, EventArgs e)
        {
            try
            {
                lbxHadRole.ClearSelection();
                lbxDivRole.ClearSelection();
                string userName = lblUserName.Text.ToString();
                String[] userInRoles = Roles.GetRolesForUser(userName);
                if (userInRoles.Length > 0)
                {
                    Roles.RemoveUserFromRoles(userName, userInRoles);
                }
                ArrayList arrayItems = new ArrayList();
                foreach (ListItem item in this.lbxHadRole.Items)
                {
                    Roles.AddUserToRole(userName, item.ToString());
                }
            }
            catch (Exception exp)
            {
                //捕获异常
                Response.Write(exp.Message);
            }
            finally
            {
                ClientScript.RegisterStartupScript(this.GetType(), "myscript", "<script>alert('分配角色成功！');</script>");
            }
        }
    }
}