C # simple address book for Asp.net

Simple address book features are simple, but include the basic functions for creating a website! Each module can be used as a reference for beginners.

Simple Address Book implementation functions: 1. logon 2. Registration 3. Background Management 4. Foreground logon 5. Create a contact 6. Change the password

Code download: http://download.csdn.net/detail/wyz365889/5773253

The functions are as follows:

The main code is as follows:

1. Underlying data module

Using System; using System. data; using System. configuration; 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; using System. data. sqlClient; using System. data; // <summary> /// DBManage abstract description /// </summary> public class DBManage {public DBManage () {// TODO: here add the constructor logic //} string strConn = @ "Data Source = WYZ-PC \ SQL2005; Integrated Security = SSPI; Initial Catalog = addressBook;"; public SqlConnection conn; public void sqlConn () // connect to the database {try {conn = new SqlConnection (strConn); conn. open () ;}catch {return ;}// read the statement execution result public SqlDataReader readResult (string strSql) {try {SqlCommand sqlComd = new SqlCommand (strSql, conn ); return sqlComd. executeReader () ;}catch {throw ;}// read data to the public bool readData (string strSql, out DataTable dt) {dt = new DataTable (); try {SqlDataAdapter sda = new SqlDataAdapter (strSql, conn); sda. fill (dt); return true;} catch (Exception e) {return false ;}// execute insert, update the statement public bool execSql (string strSql) {SqlCommand SC = new SqlCommand (strSql, conn); try {SC. executeNonQuery (); return true;} catch (Exception e) {return false ;}// query whether data exists in public bool isExistData (string strSql) {bool flag = false; try {using (SqlCommand SC = new SqlCommand () {SC. commandText = strSql; SC. connection = conn; SqlDataReader sr = SC. executeReader (); if (sr. hasRows) {flag = true;} sr. close () ;}} catch (Exception e) {flag = false;} return flag;} public void closeDB () {conn. close (); conn. dispose ();}}

2. logon code

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; using system. data. sqlclient; public partial class login: system. web. UI. page {protected void page_load (Object sender, eventargs e) {} protected void Button_login_click (Object sender, eventargs e) {dbmanage DB = new dbmanage (); dB. sqlconn (); // database connection string struserid = textbox?userid.text.trim (); string strpwd = textbox2_pwd.text.trim (); If (struserid = "| strpwd = "") {labeldomainmeg.text = "prompt: the user name or password cannot be blank! ";} Else {string strsql = @" select * From tb_user "; if (! DB. isexistdata (strsql) // if no user exists, add the Default User {db.exe csql (@ "insert into tb_user values ('admin', 'admin ') ");} string strsql2 =" select * From tb_user where userid = '"+ struserid +"' and Pwd = '"+ strpwd +"' "; if (dB. isexistdata (strsql2) {sqldatareader sqlread = dB. readresult (strsql2); sqlread. read (); string strrole = sqlread [3]. tostring (); sqlread. close (); dB. closedb (); // closes the database if (strrol E. Trim (). Equals ("Administrator") // administrator permission {response. Redirect ("Admin. aspx? Userid = "+ struserid);} else if (strrole. Trim () =" normal user ") // normal user permission {response. Redirect (" userinfo. aspx? Userid = "+ struserid) ;}} else {label?meg.text =" prompt: the password or account is incorrect. Please enter it again! "; Textbox=userid.text =" "; textbox2_pwd.text = "";}}}}

3. Registration Code

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; public partial class register: System. web. UI. page {protected void Page_Load (object sender, EventArgs e) {} DBManage db; protected void Button_reg_C Lick (object sender, EventArgs e) {db = new DBManage (); db. sqlConn (); string strUserID = textbox?userid.text.trim (); string strName = TextBox2_name.Text.Trim (); string strPwd = trim (); string strPwd2 = trim (); string strRole = "regular user "; string strSql2 = "insert into tb_user values ('" + strUserID + "', '" + strName + "', '" + strPwd + "', '"+ strRole +"') "; if (d B .exe cSql (strSql2) {Response. Write ("<script> alert ('registration successful! '); Window. location. href = 'login. aspx' </script> "); return ;}}}

4. Background Management Code

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; using System. data. sqlClient; public partial class admin: System. web. UI. page {DBManage db; string strUserID; protected void Page_Load (object sender, E VentArgs e) {if (! Page. IsPostBack) {MyBind ("select * from tb_user"); strUserID = Request. QueryString ["userID"]. ToString (); HyperLink1_pwd.NavigateUrl = "~ /Pwd. aspx? UserID = "+ strUserID;} void MyBind (String strSql) {db = new DBManage (); db. sqlConn (); SqlDataAdapter da = new SqlDataAdapter (strSql, db. conn); DataSet ds = new DataSet (); da. fill (ds); GridView1.DataSource = ds; GridView1.DataBind ();} protected void button#click (object sender, EventArgs e) {string strKey = textbox#key.text.trim (); string strID = ""; if (dropdownlistdomainselect.text = "userName") {strID = "userID";} if (dropdownlistdomainselect.text = "name") {strID = "userName ";} if (dropdownlistpolicselect.text = "") {strID = "role ";} string strSql = "select * from tb_user where" + strID + "like '" + strKey + "%'"; MyBind (strSql);} protected void GridView1_RowDeleting (object sender, gridViewDeleteEventArgs e) {db = new DBManage (); db. sqlConn (); string SQL = "delete from tb_user where userID = '" + GridView1.DataKeys [e. rowIndex]. value. toString () + "'"; SqlCommand cmd = new SqlCommand (SQL, db. conn); cmd. executeNonQuery (); db. closeDB (); MyBind ("select * from tb_user"); // call the MyBind () subroutine }}

5. Front-end login display

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; using system. data. sqlclient; public partial class userinfo: system. web. UI. page {dbmanage dB; string struserid = ""; protected void page_load (Object Sen Der, eventargs e) {If (! Page. ispostback) {mybind ("select * From tb_info"); struserid = request. querystring ["userid"]. tostring (); hyperlink1_pwd.navigateurl = "~ /Pwd. aspx? Userid = "+ struserid; hyperlink1_new.navigateurl = "~ /Newinfo. aspx? Userid = "+ struserid;} void mybind (string strsql) {DB = new dbmanage (); dB. sqlconn (); sqldataadapter da = new sqldataadapter (strsql, DB. conn); dataset DS = new dataset (); DA. fill (DS); gridview1.datasource = Ds. tables [0]. defaultview; gridview1.databind ();} protected void gridview1_rowdeleting (Object sender, gridviewdeleteeventargs e) {string SQL = "delete from tb_info where num =" + gridview1.datakeys [E. rowindex]. values [0]. tostring () + "and userid = '" + gridview1.datakeys [E. rowindex]. values [1]. tostring () + "'"; DB = new dbmanage (); dB. sqlconn (); sqlcommand cmd = new sqlcommand (SQL, DB. conn); // execute the delete operation cmd. executenonquery (); dB. closedb (); mybind ("select * From tb_info"); // call mybind () subroutine} protected void gridview1_rowediting (Object sender, gridviewediteventargs e) {gridview1.editindex = E. neweditindex; string strsql = "select * From tb_info where num =" + gridview1.datakeys [E. neweditindex]. values [0]. tostring () + "and userid = '" + gridview1.datakeys [E. neweditindex]. values [1]. tostring () + "'"; mybind (strsql);} protected void gridview1_rowcancelingedit (Object sender, gridviewcancelediteventargs e) {gridview1.editindex =-1; mybind ("select * From tb_info");} protected void gridview1_rowupdating (Object sender, gridviewupdateeventargs e) {DB = new dbmanage (); dB. sqlconn (); textbox name, sex, phone, QQ, birthday, remark; name = (textbox) gridview1.rows [E. rowindex]. cells [0]. controls [0]; Sex = (textbox) gridview1.rows [E. rowindex]. cells [1]. controls [0]; phone = (textbox) gridview1.rows [E. rowindex]. cells [2]. controls [0]; QQ = (textbox) gridview1.rows [E. rowindex]. cells [3]. controls [0]; Birthday = (textbox) gridview1.rows [E. rowindex]. cells [4]. controls [0]; remark = (textbox) gridview1.rows [E. rowindex]. cells [5]. controls [0]; string strsql = "Update tb_info set name = '" + name. text + "', sex ='" + sex. text + "', phone ='" + phone. text + "', QQ ='" + QQ. text + "', Birthday =" + birthday. text. substring (0, 9) + ", remark = '" + remark. text + "'where num =" + gridview1.datakeys [E. rowindex]. values [0]. tostring () + "and userid = '" + gridview1.datakeys [E. rowindex]. values [1]. tostring () + "'"; db.exe csql (strsql); gridview1.editindex =-1; mybind ("select * From tb_info"); // call mybind () subroutine} protected void button#click (Object sender, eventargs e) {string strkey = textbox2.text. trim (); string strsql = "select * From tb_info where name like '" + strkey + "%' or phone like '" + strkey + "%' or QQ like '" + strkey + "% '"; mybind (strsql );}}

6. Change the password

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; public partial class pwd: System. web. UI. page {string strUserID; DBManage db; protected void Page_Load (object sender, EventArgs e) {if (! IsPostBack) {strUserID = Request. queryString ["userID"]. toString (); textbox?userid.text = strUserID; textbox=userid.enabled = false;} protected void Button_pwd_Click (object sender, EventArgs e) {db = new DBManage (); db. sqlConn (); string strNewPwd = TextBox4_pwd1.Text.Trim Xt. toString () + "'"; Label1.Text = textbox#userid.text + db. isExistData (strSql ). toString () + strNewPwd. equals (strRPwd ). toString (); if (db. isExistData (strSql) {if (strNewPwd. equals (strRPwd) {string strSql2 = "update tb_user set pwd = '" + strNewPwd + "'where userID ='" + textbox#userid.text.tostring () + "'"; if (db.exe cSql (strSql2) {Label1.Text = "the password is modified successfully! ";}} Else {Label1.Text =" the password entered twice is different! ";}} Db. closeDB ();}}

7. Create a contact

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; using System. data. sqlClient; public partial class newInfo: System. web. UI. page {DBManage db; string strUserID; protected void Page_Load (object sender, EventArgs e) {if (! IsPostBack) {textbox?birthday.enabled = false; strUserID = Request. QueryString ["userID"]. ToString (); hyperlink?back.navigateurl = "~ /UserInfo. aspx? UserID = "+ strUserID;} else {strUserID = Request. queryString ["userID"]. toString () ;}} protected void calendar#selectionchanged (object sender, EventArgs e) {textbox#birthday.text = Calendar1.SelectedDate. toString ("yyyy-MM-dd");} protected void Button_reg_Click (object sender, EventArgs e) {db = new DBManage (); db. sqlConn (); string strName = TextBox2_name.Text.Trim (); string strPhone = TextBox Trim (); string strQQ = trim (); string strRemark = TextBox3_remark.Text; string strSex = ""; if (RadioButton1.Checked) {strSex = "male" ;}if (RadioButton2.Checked) {strSex = "female";} string strBir = textbox?birthday.text; string strSql = "select * from tb_info where name = '" + strName + "' or phone = '" + strPhone + "'"; if (db. isExistData (strSql) {Label1.Text = "This information already exists! "; Return;} string strSql2 =" insert into tb_info values ('"+ strUserID +"', '"+ strName +"', '"+ strSex + "', '"+ strPhone +"', '"+ strQQ +"', '"+ strBir +"', '"+ strRemark +"') "; Label1.Text = strSql2; if (db.exe cSql (strSql2) {Label1.Text = "the contact is created successfully! "; Return ;}}}