WinForm forms use assembly instantiation and parameter transfer

It is similar to encapsulating functions instantiated from a form , It's really just a C# Self contained function , When I used it, I checked it online for a long time .

This function works well in combination with the database , That is, there is no need to instantiate the form repeatedly , Improve the simplicity of code .

I'm a little cumbersome here , Because I want the login interface not to display NarBarControl, I made another layer

This article mainly talks about NarBarControl and XtraTabControl and Assembly The combination of instantiated forms

NarBarControl Automatically add... In combination with the database Group and Item The example of has been mentioned earlier , But here's a small change , Here is the Item Of URL Replaced with the name of the form . The purpose of this is to combine Assembly Instantiate the form

database structure ：

RibbonControl When switching focus pages, give NarBarControl add group

       
        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);
            }
        }

there Frm_Split It's actually NarBarControl and XtraTabControl Form , Added a SplitContainerControl Control implementation of NarBarControl Left contraction of .

Loop dynamic add NarBarControl Of Group and Item

  // Loop add group 
        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(" Error connecting to server , Please check whether the network is normal ！");
                return ;
            }
            if (dt.Rows.Count == 0)
            {
                MessageBox.Show(" The user account does not exist or has been deactivated , Please enter the correct user ！");
                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(" Failed to query menu group ！");
                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);// This call Item Function of 
                }
            }
        }
        // Add... To the group loop 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(" Error connecting to server , Please check whether the network is normal ！");
                return;
            }
            if (dt.Rows.Count == 0)
            {
                MessageBox.Show(" The user account does not exist or has been deactivated , Please enter the correct user ！");
                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(" Query menu failed ！");
                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);
                }
            }
        }

I also covered a small part of the account menu permissions , Just look Admin Just the part of .

Next is Item Click events and Assembly The instantiated part of the form ：

   #region  Form instantiation 
        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;
                    // Initialize the login interface 
                    CreateForm(namespaceName + "." + FormName + "." + e.Link.Item.Name, namespaceName, tabFrmLog, Frm_Split, lbl_userID.Caption.Trim(), btn_UserName.Caption.Trim());
                    // Set the subform size to tab size 
                    Frm_Split.tabs.TabPages.Add(tabFrmLog);
                    Frm_Split.tabs.SelectedTabPage = tabFrmLog;
                }
            }

        }
        /// <summary>  
        ///  Open a new subform   
        /// </summary>  
        /// <param name="strName"> The class name of the form </param>  
        /// <param name="AssemblyName"> The name of the class library where the form is located </param>   
        public static void CreateForm(string strName, string AssemblyName , XtraTabPage tabFrmLog,Frm_Split Frm_Split,string userID,string UserName)
        {
            string path = AssemblyName;// Project Assembly Option name   
            string name = strName; // The name of the class   
            //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;
        }

I need to use MidStrEx（） The reason for the function is because I put the form under the folder , If you put it directly under the project, you don't need this function