Ajax实现DataGrid/DataList动态ToolTip
1.建立一aspx页面，html代码2.cs代码
using System.Data.SqlClient;
using System.IO;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindData();
}
if (ID != "")
{
GetDescriptionByID(ID);
}
}
property#region property
private string ID
{
get
{
if (Request != null && Request.ToString() != "")
{
return Request;
}
else
{
return "";
}
}
}
#endregion
GetDescriptionByID#region GetDescriptionByID
private void GetDescriptionByID(string ID)
{
string connStr = ConfigurationSettings.AppSettings;
SqlConnection conn = new SqlConnection(connStr);
string sql = "select * from testimage where userid="" + ID + """;
SqlCommand cmd = new SqlCommand(sql, conn);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
string s = @"<table cellspacing="0" cellpadding="4" width="300" height="200" border="0" id="GridView1" style="color:#333333;border-collapse:collapse;">";
if(dr.Read())
{
s += "<tr style="color:#333333;background-color:#FFFBD6;">";
s += "<td width="50">名称:</td>";
s += "<td>" + dr + "</td>";
s += "</tr>";
s += "<tr style="color:#333333;background-color:White;">";
s += "<td scope="col">描述:</td>";
s += "<td>" + dr + "</td>";
s += "</tr>";
}
s += "</table>";
dr.Close();
conn.Close();
this.Response.Write(s);
this.Response.End();
}
#endregion
save image#region save image
protected void Button2_Click(object sender, EventArgs e)
{
Stream ImageStream;
string Path = FileUpload1.PostedFile.FileName;// 文件名称
int Size = FileUpload1.PostedFile.ContentLength; // 文件大小
string Type = FileUpload1.PostedFile.ContentType; // 文件类型
ImageStream = FileUpload1.PostedFile.InputStream;
byte;
int Status = ImageStream.Read(Content, 0, Size);
SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings);
SqlCommand comm = new SqlCommand("insert into testimage (UserName,Image,Path,Type,Description) values(@UserName,@Image,@Path,@Type,@Description)", conn);
comm.CommandType = CommandType.Text;
comm.Parameters.Add("@UserName", SqlDbType.VarChar, 255).Value = txtUserName.Text;
comm.Parameters.Add("@Image", SqlDbType.Image).Value = Content;
comm.Parameters.Add("@Path", SqlDbType.VarChar, 255).Value = Path;
comm.Parameters.Add("@Type", SqlDbType.VarChar, 255).Value = Type;
comm.Parameters.Add("@Description", SqlDbType.VarChar, 2000).Value = this.TextBox1.Text;
conn.Open();
comm.ExecuteNonQuery();
conn.Close();
}
#endregion
BindData#region BindData
private void BindData()
{
string sql = "select * from testimage";
DataSet ds = GetDataSet(sql);
this.DataList1.DataSource = ds;
this.DataList1.DataBind();
}
#endregion
GetDataSet#region GetDataSet
private DataSet GetDataSet(string sql)
{
string constring = System.Configuration.ConfigurationSettings.AppSettings;
SqlDataAdapter sda = new SqlDataAdapter(sql, constring);
DataSet ds = new DataSet();
sda.Fill(ds);
return ds;
}
#endregion3.数据库脚本
if exists (select * from dbo.sysobjects where id = object_id(N".") and OBJECTPROPERTY(id, N"IsUserTable") = 1)
drop table .
GO
CREATE TABLE . (
IDENTITY (1, 1) NOT NULL ,
(500) COLLATE Chinese_PRC_CI_AS NULL ,
NULL ,
(500) COLLATE Chinese_PRC_CI_AS NULL ,
(20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
(2000) COLLATE Chinese_PRC_CI_AS NULL
) ON TEXTIMAGE_ON
GO
<html>
<head>
<title>WebForm1</title>
<style type="text/CSS">.logo {}{ POSITION: absolute }.dek {}{ Z-INDEX: 200; VISIBILITY: hidden; POSITION: absolute }</style>
</head>
<body>
<Form runat="server">
<DIV class="dek" id="dek"></DIV>
<script language="javascript">
Xoffset=-20;
Yoffset= 20;
var nav,yyy=-1000;
var skn=dek.style;
document.onmousemove=get_mouse;
//Ajax
var xmlHttp;
function createXMLHttpRequest()
{
if (window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
function startRequest(id)
{
createXMLHttpRequest();
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("GET", "?ID="+id, true);
xmlHttp.send(null);
}
var content;
function handleStateChange()
{
if(xmlHttp.readyState == 4)
{
if(xmlHttp.status == 200)
{
content=xmlHttp.responseText;
}
}
}
//tooltip
function popup(id)
{
startRequest(id);
yyy=Yoffset;
document.all("dek").innerHTML=content;
skn.visibility="visible"
}
function get_mouse(e)
{
var x=event.x+document.body.scrollLeft;
skn.left=x+Xoffset;
var y=event.y+document.body.scrollTop;
skn.top=y+yyy;
}
function kill()
{
yyy=-1000;
skn.visibility="hidden";
}
</script>
<div>
<asp:FileUpload ID="FileUpload1" runat="server" /><br>名称:<asp:TextBox ID="txtUserName"
runat="server"></asp:TextBox><br>
描述:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br>
<asp:Button ID="Button2" runat="server" Text="保存" />
<asp:DataList id="DataList1"
BorderColor="black"
CellPadding="1"
CellSpacing="4" HorizontalAlign="Center"
R
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