Winform窗体使用Assembly实例化及传参

类似于把窗体实例化的函数进行封装，其实就是一个C#自带的函数，当时用的时候在网上查了好久。

这个函数结合数据库来使用效果很好，就是不用重复的对窗体进行实例化，提高代码的简洁度。

我这里比较繁琐了些，因为想登陆界面不显示NarBarControl，我又多做了一层

这篇主要讲NarBarControl和XtraTabControl和Assembly实例化窗体的结合使用

NarBarControl结合数据库自动添加Group和Item的实例前面已有讲过，但是这里有一点小改动，这里把Item的URL换成了窗体的名称。这样做的目的就是接下来结合Assembly实例化窗体

数据库结构：

RibbonControl焦点页切换的时候给NarBarControl添加组

       
        private void RBControl_SelectedPageChanged(object sender, EventArgs e)
        {
            if (RBControl.SelectedPage != null && RBControl.SelectedPage.Name.ToString().Trim() != "")
            {
               
                Frm_Split = Frm_Split.CreateFrom(this);
                Frm_Split.TopLevel = false;
                Frm_Split.Parent = Panel;
                Frm_Split.Dock = DockStyle.Fill;
                Frm_Split.Show();

                page = RBControl.SelectedPage.Name.ToString().Trim();
                Frm_Split.Menu.Groups.Clear();
                DetailReportGroup(page, Frm_Split);
            }
        }

这里的Frm_Split实际上就是NarBarControl和XtraTabControl的窗体，加了一个SplitContainerControl的控件实现NarBarControl的左收缩。

循环动态添加NarBarControl的Group和Item

  //循环添加组
        private void DetailReportGroup(string pageName, Frm_Split frm)
        {
            string sql = "select isAdmin from UserInf where userID='" + lbl_userID.Caption.Trim().ToLower() + "' and isUse='Y'";
            DataTable dt;
            if (!DB.AF.execSql(sql, sqlconnks, out dt))
            {
                MessageBox.Show("连接服务器错误，请检查网络是否正常！");
                return ;
            }
            if (dt.Rows.Count == 0)
            {
                MessageBox.Show("该用户账号不存在或已停用，请输入正确的用户！");
                return ;
            }
            if (dt.Rows[0]["isAdmin"].ToString().Trim() == "Y")
            {
                sql = "select MenuID,MenuName from Sys_Menu where Flag = 'Group' and Isuse = 'Y' and Page = '" + pageName + "'";
            }
            else sql = "select a.MenuID MenuID,b.MenuName MenuName from sys_Menu_User a left join sys_Menu b on a.MenuID = b.MenuID where Flag = 'Group' and a.Isuse = 'Y' and b.Isuse = 'Y' and Page = '" + pageName + "' and userID = '" + lbl_userID.Caption.Trim() + "'";
            dt.Clear();
            if (!DB.AF.execSql(sql, sqlconn, out dt))
            {
                MessageBox.Show("查询菜单组失败！");
                return;
            }
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    NavBarGroup nbGroup = new NavBarGroup();
                    nbGroup.Name = dt.Rows[i]["MenuID"].ToString();
                    nbGroup.Caption = dt.Rows[i]["MenuName"].ToString();
                    frm.Menu.Groups.Add(nbGroup);
                    DetailReportItem(nbGroup, pageName);//这里调用Item的函数
                }
            }
        }
        //对组循环添加Item
        private void DetailReportItem(NavBarGroup GroupName, string pageName)
        {
            string sql = "select isAdmin from UserInf where userID='" + lbl_userID.Caption.Trim().ToLower() + "' and isUse='Y'";
            DataTable dt;
            if (!DB.AF.execSql(sql, sqlconnks, out dt))
            {
                MessageBox.Show("连接服务器错误，请检查网络是否正常！");
                return;
            }
            if (dt.Rows.Count == 0)
            {
                MessageBox.Show("该用户账号不存在或已停用，请输入正确的用户！");
                return;
            }
            if (dt.Rows[0]["isAdmin"].ToString().Trim() == "Y")
            {
                sql = "select URL,MenuName from Sys_Menu where Flag = 'Item' and upID = '" + GroupName.Name + "' and Isuse = 'Y' and Page = '" + pageName + "'";
            }
            else sql = "select b.URL URL,b.MenuName MenuName from sys_Menu_User a left join sys_Menu b on a.MenuID = b.MenuID where Flag = 'Item' and upID = '" + GroupName.Name + "' and a.Isuse = 'Y' and b.Isuse = 'Y' and Page = '" + pageName + "' and userID = '"+lbl_userID.Caption.Trim()+"'";
            dt.Clear();
            if (!DB.AF.execSql(sql, sqlconn, out dt))
            {
                MessageBox.Show("查询菜单失败！");
                return;
            }
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    NavBarItem nbItem = new NavBarItem();
                    nbItem.Name = dt.Rows[i]["URL"].ToString();
                    nbItem.Caption = dt.Rows[i]["MenuName"].ToString();
                    nbItem.LinkClicked += Item_Click;
                    GroupName.ItemLinks.Add(nbItem);
                }
            }
        }

我这里还涉及到了账户菜单权限的一小部分内容，只需要看Admin的那部分就行。

接下来是Item的点击事件和Assembly窗体实例化的部分：

   #region 窗体实例化
        private void Item_Click(object sender, NavBarLinkEventArgs e)
        {
            FormName = MidStrEx(e.Link.Item.Name,"_","_");
            if (FormName.Length > 0)
            {
                bool bzj = false;
                if (Frm_Split.tabs.Controls.Count != 0)
                {
                    foreach (XtraTabPage page in Frm_Split.tabs.TabPages)
                    {
                        if (page.Name == e.Link.Item.Name)
                        {
                            bzj = true;
                            Frm_Split.tabs.SelectedTabPage = page;
                            return;
                        }
                    }
                }
                if (bzj == false)
                {
                    XtraTabPage tabFrmLog = new XtraTabPage();
                    tabFrmLog.Text = e.Link.Caption;
                    tabFrmLog.Name = e.Link.Item.Name;
                    //初始化登录界面
                    CreateForm(namespaceName + "." + FormName + "." + e.Link.Item.Name, namespaceName, tabFrmLog, Frm_Split, lbl_userID.Caption.Trim(), btn_UserName.Caption.Trim());
                    //子窗体大小设置为选项卡大小
                    Frm_Split.tabs.TabPages.Add(tabFrmLog);
                    Frm_Split.tabs.SelectedTabPage = tabFrmLog;
                }
            }

        }
        /// <summary>  
        /// 打开新的子窗体  
        /// </summary>  
        /// <param name="strName">窗体的类名</param>  
        /// <param name="AssemblyName">窗体所在类库的名称</param>   
        public static void CreateForm(string strName, string AssemblyName , XtraTabPage tabFrmLog,Frm_Split Frm_Split,string userID,string UserName)
        {
            string path = AssemblyName;//项目的Assembly选项名称  
            string name = strName; //类的名字  
            //XtraMessageBox.Show(path + ";" + name);
            object[] args = new object[3];
            args[0] = Frm_Split;
            args[1] = userID;
            args[2] = UserName;
            Form doc = (Form)Assembly.Load(path).CreateInstance(name, true, System.Reflection.BindingFlags.Default, null, args, null, null);
            doc.TopLevel = false;
            doc.Dock = DockStyle.Fill;
            doc.FormBorderStyle = FormBorderStyle.None;
            tabFrmLog.Controls.Add(doc);
            doc.Show();
        }
        public static string MidStrEx(string sourse, string startstr, string endstr)
        {
            string result = string.Empty;
            int startindex, endindex;
            try
            {
                startindex = sourse.IndexOf(startstr);
                if (startindex == -1)
                    return result;
                string tmpstr = sourse.Substring(startindex + startstr.Length);
                endindex = tmpstr.IndexOf(endstr);
                if (endindex == -1)
                    return result;
                result = tmpstr.Remove(endindex);
            }
            catch (Exception ex)
            {
                XtraMessageBox.Show("MidStrEx Err:" + ex.Message);
            }
            return result;
        }

我这里需要用到MidStrEx（）函数的原因是因为我把窗体放在了文件夹下面，如果直接放在项目下则不需要这个函数