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["ID"] != null && Request["ID"].ToString() != "")
{
return Request["ID"];
}
else
{
return "";
}
}
}
#endregion
GetDescriptionByID#region GetDescriptionByID
private void GetDescriptionByID(string ID)
{
string connStr = ConfigurationSettings.AppSettings["ConnectionString"];
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["UserName"] + "</td>";
s += "</tr>";
s += "<tr style='color:#333333;background-color:White;'>";
s += "<td scope='col'>描述:</td>";
s += "<td>" + dr["Description"] + "</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[] Content = new byte[Size];
int Status = ImageStream.Read(Content, 0, Size);
SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
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["ConnectionString"];
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'[dbo].[TestImage]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[TestImage]
GO
CREATE TABLE [dbo].[TestImage] (
[UserID] [int] IDENTITY (1, 1) NOT NULL ,
[UserName] [nvarchar] (500) COLLATE Chinese_PRC_CI_AS NULL ,
[Image] [image] NULL ,
[Path] [nvarchar] (500) COLLATE Chinese_PRC_CI_AS NULL ,
[Type] [nvarchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Description] [nvarchar] (2000) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
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" OnClick="Button2_Click" Text="保存" />
<asp:DataList id="DataList1"
BorderColor="black"
CellPadding="1"
CellSpacing="4" HorizontalAlign="Center"
RepeatColumns="4"
RepeatLayout="Table"
runat="server" ShowFooter="true" ShowHeader="true"
width="100%">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "UserName")%><br>
<img ID="img1" onmouseover="popup(<%# DataBinder.Eval(Container.DataItem, "UserID")%>);" onmouseout="kill();" src='<%# DataBinder.Eval(Container.DataItem, "Path") %>' height='150'/>
</ItemTemplate>
</asp:DataList>
</div>
</Form>
</body>
</html>
