欢迎您访问我爱IT技术网,今天小编为你分享的编程技术是:【.net中即时消息发送的实现】,下面是详细的分享!
.net中即时消息发送的实现
用了我一下午的时间终于写完并整理好了利用.net来发送即时消息的材料(当然了,还有上午的数据库设计:)
数据库设计:info表:idfromstu_idtostu_idcontentterm
其中id是主键,fromstu_id是发送信息的用户的学号(这是和我做的学友录连在一起的),tostu_id是接受信息的用户的学号,content是消息的内容,term是判断是否为新消息。
下面的代码家在校友录中的ifnotispostback中
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下面的代码是用来发送即时消息的页面,其中里面分了两个部分,一个是用来回复的,一个是用来专门发送的,两个的页面稍有区别,仔细看一下就会明白的:)
Public Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not IsPostBack Then
Dim tostu_id As String=Request.QueryString("tostu_id")
If tostu_id="" Then
'//////////////////当回复留言时
Dim sql As String="select a.*,b.nick from info a,pwd b where a.fromstu_id=b.stu_id and a.tostu_id='" & Session("stu_id") & "' and a.term=1"
Dim comm As SqlCommand=New SqlCommand(sql, conn)
Dim dr As SqlDataReader
conn.Open()
dr=comm.ExecuteReader
While dr.Read
Label3.Text=dr.Item("nick")
Label4.Text=dr.Item("tim")
Label5.Text=dr.Item("content")
TextBox1.Text=dr.Item("nick")
TextBox3.Text=dr.Item("fromstu_id")
TextBox1.Enabled=False
Label8.Visible=False
End While
dr.Close()
comm.Cancel()
'//////////////////////更新留言使留言属性为已阅读过
Dim sql_1 As String="update info set term=0 where tostu_id='" & Session("stu_id") & "' and term=1 and tim='" & Label4.Text & "'"
comm=New SqlCommand(sql_1, conn)
comm.ExecuteNonQuery()
Else
'////////////////////当发送留言时
Dim mysql As String="select nick from pwd where stu_id='" & tostu_id & "'"
Dim comm As SqlCommand=New SqlCommand(mysql, conn)
Dim dr As SqlDataReader
conn.Open()
dr=comm.ExecuteReader
While dr.Read
TextBox1.Text=dr.item("nick")
End While
TextBox1.Enabled=False
Label3.Text=""
Label4.Text=""
Label5.Visible=False
Label8.Visible=True
Label6.Visible=False
Label7.Visible=False
Label9.Visible=False
dr.close()
End If
End If
End Sub
'/////////////////书写提交消息事件
Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim tostu_id As String=Request.QueryString("tostu_id")
If tostu_id="" Then
'/////////////////////////当回复留言时
conn.Open()
Dim sql As String="insert into info(fromstu_id,tostu_id,content,term,tim) values(@fromstu_id,@tostu_id,@content,@term,@tim)"
Dim comm As SqlCommand=New SqlCommand(sql, conn)
comm.Parameters.Add(New SqlParameter("@fromstu_id", SqlDbType.Int, 4))
comm.Parameters("@fromstu_id").Value=Session("stu_id")
comm.Parameters.Add(New SqlParameter("@tostu_id", SqlDbType.Int, 4))
comm.Parameters("@tostu_id").Value=TextBox3.Text
comm.Parameters.Add(New SqlParameter("@content", SqlDbType.VarChar, 200))
comm.Parameters("@content").Value=TextBox2.Text
comm.Parameters.Add(New SqlParameter("@term", SqlDbType.Int, 4))
comm.Parameters("@term").Value="1"
comm.Parameters.Add(New SqlParameter("@tim", SqlDbType.Char, 20))
comm.Parameters("@tim").Value=Date.Now
comm.ExecuteNonQuery()
TextBox2.Text=""
Else
'/////////////////////////当发送留言时
conn.Open()
Dim sql As String="insert into info(fromstu_id,tostu_id,content,term,tim) values(@fromstu_id,@tostu_id,@content,@term,@tim)"
Dim comm As SqlCommand=New SqlCommand(sql, conn)
comm.Parameters.Add(New SqlParameter("@fromstu_id", SqlDbType.Int, 4))
comm.Parameters("@fromstu_id").Value=Session("stu_id")
comm.Parameters.Add(New SqlParameter("@tostu_id", SqlDbType.Int, 4))
comm.Parameters("@tostu_id").Value=tostu_id
comm.Parameters.Add(New SqlParameter("@content", SqlDbType.VarChar, 200))
comm.Parameters("@content").Value=TextBox2.Text
comm.Parameters.Add(New SqlParameter("@term", SqlDbType.Int, 4))
comm.Parameters("@term").Value="1"
comm.Parameters.Add(New SqlParameter("@tim", SqlDbType.Char, 20))
comm.Parameters("@tim").Value=Date.Now
comm.ExecuteNonQuery()
TextBox2.Text=""
End If
Response.Write("<script language=javascript>alert('发送成功!')</script>")
End Sub
'////////////////////返回继续发送
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Response.Redirect("boaman.aspx")
End Sub
End Class
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="info.aspx.vb" Inherits="_99re1.info"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title></title>
<meta content="Microsoft Visual Studio.NET 7.0" name="GENERATOR">
<meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body background="image/bg.gif" MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:image id="Image3" style="Z-INDEX: 111; LEFT: 141px; POSITION: absolute; TOP: 312px" runat="server" Width="221px" Height="98px" ImageUrl="image/99re1-1.gif"></asp:image>
<asp:textbox id="TextBox1" style="Z-INDEX: 101; LEFT: 73px; POSITION: absolute; TOP: 123px" runat="server" BorderColor="Navy" BorderWidth="1px"></asp:textbox>
<asp:label id="Label1" style="Z-INDEX: 102; LEFT: 26px; POSITION: absolute; TOP: 127px" runat="server" Width="42px" Height="18px" Font-Size="X-Small" ForeColor="Navy" Font-Bold="True">发往:</asp:label>
<asp:label id="Label2" style="Z-INDEX: 103; LEFT: 26px; POSITION: absolute; TOP: 156px" runat="server" Font-Size="X-Small" ForeColor="Navy" Font-Bold="True">内容:</asp:label>
<asp:textbox id="TextBox2" style="Z-INDEX: 104; LEFT: 73px; POSITION: absolute; TOP: 154px" runat="server" TextMode="MultiLine" Width="449px" Height="74px" BorderColor="Navy" BorderWidth="1px" MaxLength="200"></asp:textbox>
<asp:button id="Button1" style="Z-INDEX: 105; LEFT: 357px; POSITION: absolute; TOP: 252px" runat="server" Width="50px" Height="20px" Text="发送" BorderColor="Navy" BorderWidth="1px" BackColor="#FFE0C0"></asp:button>
<asp:button id="Button2" style="Z-INDEX: 106; LEFT: 176px; POSITION: absolute; TOP: 253px" runat="server" Width="87px" Height="20px" Text="继续发送…" BorderColor="Navy" BorderWidth="1px" BackColor="#FFE0C0"></asp:button>
<asp:label id="Label3" style="Z-INDEX: 107; LEFT: 75px; POSITION: absolute; TOP: 10px" runat="server" Width="135px" Height="6px" Font-Size="Small">Label</asp:label>
<asp:label id="Label4" style="Z-INDEX: 108; LEFT: 300px; POSITION: absolute; TOP: 9px" runat="server" Width="219px" Height="13px" Font-Size="Small">Label</asp:label>
<asp:label id="Label5" style="Z-INDEX: 109; LEFT: 73px; POSITION: absolute; TOP: 40px" runat="server" Width="447px" Height="71px" Font-Size="X-Small" BorderColor="SlateGray" BorderWidth="1px">Label</asp:label>
<asp:label id="Label6" style="Z-INDEX: 110; LEFT: 26px; POSITION: absolute; TOP: 12px" runat="server" Font-Size="X-Small" ForeColor="Red" Font-Bold="True">来自:</asp:label>
<asp:TextBox id="TextBox3" style="Z-INDEX: 112; LEFT: 247px; POSITION: absolute; TOP: 122px" runat="server" Visible="False"></asp:TextBox>
<asp:Label id="Label8" style="Z-INDEX: 113; LEFT: 116px; POSITION: absolute; TOP: 55px" runat="server" Height="33px" Width="327px" Font-Bold="True" ForeColor="Navy" Font-Size="Large" Font-Names="方正姚体" Font-Underline="True">直接写入内容点击发送即可!</asp:Label>
<asp:Label id="Label7" style="Z-INDEX: 114; LEFT: 225px; POSITION: absolute; TOP: 12px" runat="server" Height="15px" Width="71px" Font-Bold="True" ForeColor="Red" Font-Size="X-Small">发信日期:</asp:Label>
<asp:Label id="Label9" style="Z-INDEX: 115; LEFT: 25px; POSITION: absolute; TOP: 41px" runat="server" Font-Bold="True" ForeColor="Red" Font-Size="X-Small">内容:</asp:Label>
</FONT>
</form>
</body>
</HTML>
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