C#和数据库应用实训报告(5)

山东科技大学

Lb_Message.Text = \聊天用户不能为空！\ }

}

//给服务器发消息

public void SendMessage(string msg) {

byte[] buf = Encoding.UTF8.GetBytes(msg); clientSocket.Send(buf); }

//取消发送

private void Btn_Clear_Click(object sender, EventArgs e) {

Txt_Message.Clear(); }

//显示用户名

private void Lb_UserList_SelectedIndexChanged(object sender, EventArgs e) {

D_User getName = new D_User();

ChatUser = Lb_UserList.SelectedItem.ToString();

M_User GetName = getName.GetUserByPhone(ChatUser); Lbl_FriendName.Text = GetName.UserName; }

//从数据库中查询好友

private void Btn_ReferFriend_Click(object sender, EventArgs e) {

D_User referphone = new D_User();

M_User Referphone = referphone.GetUserByPhone(Txt_ReferPhone.Text); if (Referphone!=null) {

Lb_ReferPhone.Items.Add(Referphone.Phone); MessageBox.Show(\查询成功！\ }

else {

MessageBox.Show(\您所查找的用户不存在！\ } }

//添加好友并保存到数据库

private void Btn_AddFriend_Click(object sender, EventArgs e) {

Receivephone.Phone = Lb_ReferPhone.SelectedItem.ToString(); if (MySelf.Phone == Receivephone.Phone) {

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MessageBox.Show(\自己不能添加自己为好友！\ return; }

//获取好友状态 0代表发送请求，1代表同意加好友，-1代表拒绝加好友，2代表加入黑名单，null 代表未申请添加过

int? state = D_ToPerson.GetFriendState(MySelf.Phone, Receivephone.Phone); bool isContinue = false; //是否继续申请 if (state == 1) {

MessageBox.Show(string.Format(\与【{0}】已是好友关系！\Receivephone.Phone)); return; }

else if (state == 0) {

isContinue = MessageBox.Show(\已发送过请求，对方还未回复是否继续发送\提示\

}

else if (state == 2) {

MessageBox.Show(\已被设为黑名单，无法提交申请！\ return; }

else if (!state.HasValue) {

isContinue = true; }

if (isContinue) {

bool b = true;

if (!state.HasValue) {

b = D_ToPerson.SaveFriend(MySelf.Phone, Receivephone.Phone); } if (b) {

//添加好友命令+好友状态+请求人电话,接收人电话

string message = ADDFRIEND + \\+ MySelf.Phone + \+ Receivephone.Phone;

//发送消息

SendMessage(message); }

Lb_ReferPhone.ClearSelected();

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山东科技大学

} }

//删除好友

private void Btn_DelFriend_Click(object sender, EventArgs e) {

string ReferFriend = \

ReferFriend = Lb_UserList.SelectedItem.ToString(); Lb_UserList.Items.Remove(ReferFriend); }

//建立群

D_User D_U = new D_User();

M_Group GroupName = new M_Group(); D_User referGroupName = new D_User();

private void Btn_BuildGroup_Click(object sender, EventArgs e) { M_Group ReferGroupName referGroupName.GetGroupName(Txt_GroupName.Text); if (ReferGroupName!=null) {

bool b = referGroupName.BuildGroup(Txt_GroupName.Text); MessageBox.Show(\建群成功！！\ } else {

MessageBox.Show(\该群已存在！！\ } }

//从数据库中查询群名称

private void Btn_ReferGroup_Click(object sender, EventArgs e) {

D_User referGroupName = new D_User(); M_Group ReferGroupName referGroupName.GetGroupName(Txt_GroupName.Text); if (ReferGroupName != null) {

Lb_ReferGroupName.Items.Add(ReferGroupName.GroupName); MessageBox.Show(\查询成功！\ } else {

MessageBox.Show(\您所查找的群不存在！\ } }

private void Btn_Close_Click(object sender, EventArgs e)

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{

Application.Exit(); }

//加入该群

private void Btn_AddGroup_Click(object sender, EventArgs e) {

M_Group groupname = new M_Group();

groupname.GroupName= Lb_ReferGroupName.SelectedItem.ToString(); } } }

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