Step by step SharePoint Development Study Notes Series 5. Web Part Development

Summary

There are now two different Web parts. The old WSS-style webpart depends on Microsoft. Sharepoint. dll and must inherit from the webpart base class defined in WSS 2.0. Its namespace is Microsoft. Sharepoint. webpartpages. The new ASP-style webpart depends on system. web. DLL, which must be inherited from a different ASP.. NET 2.0 defines the webpart base class, and its namespace is system. web. UI. webcontrols. webparts.

We will start with a simple hello word Web part:

Code Design:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web.UI.WebControls.WebParts;using System.Xml.Serialization;using System.Web.UI;namespace LearnWriteWebPart.Webpart{    [ToolboxData("<{0}:SampleWebPart runat=server></{0}:SampleWebPart>")]    [XmlRoot(Namespace = "LearnWriteWebPart.Webpart")]    public class SampleWebPart : WebPart    {        private string _Text = "Hello World!";        [WebBrowsable(true), Personalizable(true)]        public string Text        {            get { return _Text; }            set { _Text = value; }        }        protected override void Render(System.Web.UI.HtmlTextWriter writer)        {            writer.Write(_Text);        }    }}

In the spring blog we have created, perform the following operations to add the webpart to the site:

1. Activate the self-written webpart. Click populate gallery as follows.

2. Load the Web Part in the spring blog. First click Edit page.

3. Click Add web a part and select our samplewebpart.

4. The results are the same as we thought.

Next, let's make a complicated part. to log on to the web part, add a user control and name it loginusercontrol. ascx,

The Code is designed as follows:

<% @ Control Language = "C #" autoeventwireup = "true" codefile = "loginusercontrol. ascx. CS "inherits =" webusercontrol_loginusercontrol "%> <style type =" text/CSS ">. style1 {width: 32%; Height: 28px ;}. style2 {width: 128px ;}</style> <Table class = "style1"> <tr> <TD class = "style2"> <asp: label id = "lbluseraccount" runat = "server" text = "useraccount:"> </ASP: Label> </TD> <asp: textbox id = "txtuseraccount" runat = "server" tabindex = "1"> </ASP: textbox> <asp: requiredfieldvalidator id = "rfvuseraccount" runat = "server" controltovalidate = "txtuseraccount" errormessage = "username cannot be blank"> </ASP: requiredfieldvalidator> </TD> </tr> <TD class = "style2"> <asp: Label id = "lblpassword" runat = "server" text = "password: "> </ASP: Label> </TD> <asp: textbox id = "txtpassword" runat = "server" textmode = "password" tabindex = "2"> </ASP: textbox> <asp: requiredfieldvalidator id = "rfvpassword" runat = "server" controltovalidate = "txtpassword" errormessage = "password cannot be blank"> </ASP: requiredfieldvalidator> </TD> </tr> <TD class = "style2"> & nbsp; </TD> <asp: button id = "btnlogin" runat = "server" tabindex = "3" onclick = "btnlogin_click" text = "login"/> <asp: label id = "lblresult" runat = "server" bordercolor = "red" forecolor = "red"> </ASP: Label> </TD> </tr> </table>

 

The background code is as follows:

using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using LearnWriteWebPart.BE;using LearnWriteWebPart.BO;using LearnWriteWebPart.Util;public partial class WebUserControl_LoginUserControl : System.Web.UI.UserControl{    /// <summary>    ///     /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void Page_Load(object sender, EventArgs e)    {        if (!Page.IsPostBack)        {            SetInitial();        }    }    protected void btnLogin_Click(object sender, EventArgs e)    {        if (!CheckUserAccountLength())            return;        if (!CheckPasswordLength())            return;        this.CheckLogin();    }    #region Private Method    /// <summary>    /// Initial Control    /// </summary>    private void SetInitial()    {        txtUserAccount.Focus();        CodeHelper.DisableIMEModes(new TextBox[] { txtUserAccount, txtPassword});    }        /// <summary>    /// Check login    /// </summary>    private void CheckLogin()    {        UserBE userBE = new UserBE();        UserBO userBO = new UserBO();        userBE.UserAccount = txtUserAccount.Text.Trim();        userBE.Password = txtPassword.Text.Trim();        if (userBO.CheckUserLogin(userBE))        {            lblResult.Text = Constants.SUSSCESSFULLOGIN_USER;        }        else        {            lblResult.Text = Constants.ERRORLOGIN_USER;        }    }    /// <summary>    /// check password length    /// </summary>    /// <returns></returns>    private bool CheckPasswordLength()    {        int length = txtPassword.Text.Trim().Length;        if (length < 6)        {            lblResult.Text = Constants.PASSWORDMINLENGTH_USER;            return false;        }        else if (length > 20)        {            lblResult.Text = Constants.PASSWORDMAXLENGTH_USER;            return false;        }        return true;    }    /// <summary>    /// Check user account length    /// </summary>    /// <returns></returns>    private bool CheckUserAccountLength()    {        int length = txtUserAccount.Text.Trim().Length;        if (length > 20)        {            lblResult.Text = Constants.USERACCOUNTMAXLENGTH_USER;            return false;                }        return true;    }    #endregion}

 

 

I believe everyone knows the code of userbe and userbo, so I will not post it.

The webpart code is as follows:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web.UI.WebControls.WebParts;using System.Xml.Serialization;using System.Web.UI;using LearnWriteWebPart.Util;namespace LearnWriteWebPart.Webpart{    [ToolboxData("<{0}:UserWebPart runat=server></{0}:UserWebPart>")]    [XmlRoot(Namespace = "LearnWriteWebPart.Webpart")]    public class UserWebPart : WebPart    {        #region [Private Variable]        private string _ListName = string.Empty;        private string _Url = string.Empty;        private string TheListName = Constants.LISTNAME_USER;        private UserControl _userControl;        #endregion        #region [Custom Properties]        /// <summary>        /// This list naem        /// </summary>        [WebBrowsable(false),         Personalizable(true)]        public string ListName        {            get            {                return _ListName;            }            set            {                _ListName = value;            }        }        /// <summary>        /// The list Url        /// </summary>        [WebBrowsable(false),         Personalizable(true)]        public string Url        {            get            {                return _Url;            }            set            {                _Url = value;            }        }        #endregion        #region [Constructors]        /// <summary>        /// The sample constructor        /// </summary>        public UserWebPart()        {            this.ListName = TheListName;        }        #endregion        #region [Override Methods]        /// <summary>        /// Override method to OnInit method        /// </summary>        /// <param name="e">The EventsArgs object</param>        protected override void OnInit(EventArgs e)        {            base.OnInit(e);            SetWebPartTitleAndUrlWhenAdded(this.ListName, this.Url);            AddControlToWebPart();        }        #endregion        #region [Private Methods]        /// <summary>        /// Add Login Control        /// </summary>        private void AddControlToWebPart()        {            Type controlType = Type.GetType("ASP.webusercontrol_loginusercontrol_ascx,Web_deploy, Version=1.0.0.0, Culture=neutral, PublicKeyToken=1234567f94a516f5");            _userControl = (UserControl)this.Page.LoadControl(controlType, null);            this.Controls.Add(_userControl);        }        /// <summary>        /// Set webpart title and url        /// </summary>        /// <param name="ListName"></param>        /// <param name="Url"></param>        private void SetWebPartTitleAndUrlWhenAdded(string ListName, string Url)        {            this.Title = this.ListName;            this.TitleUrl = this.Url;        }        #endregion    }}

 

The result is as follows:

See the picture we expected.

Next, we will create a webpart and editwebpart of the user's Xiangxi information.

Author: Spring Yang

Source: http://www.cnblogs.com/springyangwc/

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