留言发布时间功能:
界面:
前台代码:
在Datalist控件中:
在<%#getIsDate(Convert.ToString(Eval("issuanceDate")))%>发布的评论：</td>
后台代码:
//返回发布的时间
public string getIsDate(string date)
{
//转换时间
DateTime isDate = Convert.ToDateTime(date);
//获取当前时间
DateTime nowDate = DateTime.Now;
//获取两个时间的差
TimeSpan ts = nowDate - isDate;
//将时间差转换为分
int second = Convert.ToInt32(ts.TotalSeconds) / 60;
if (second == 0)
{
return "60秒内";
}
else
if (second < 60)
{
return second.ToString() + "分钟前";
}
else if (second > 60 && second < 1440)
{
return Convert.ToString(second / 60) + "小时前";
}
else
return date;
}
投票获取IP,防止再投:
//将视频id和用户ip保存到数据库中防止重复投票
protected void addPoll(string sqlUpd, string videoId)
{
//获取当前用户的ip
string userIP = Request.UserHostAddress.ToString();
//编写SQL查询用户ip是否已对该视频投票
string sqlSel = "select * from videoPoll where ip='" + userIP + "' and videoId='" + videoId + "'";
if (!(operateData.getCount(sqlSel) > 0))
{
//如果未投票执行SQL语句进行投票
operateData.execSql(sqlUpd);
//编写SQL语句记录用户的ip和视频id
string sqlIns = "insert videoPoll values('" + userIP + "'," + videoId + ")";
operateData.execSql(sqlIns);
RegisterStartupScript("", "<script>alert('成功！')</script>");
}
else
{
RegisterStartupScript("", "<script>alert('一个视频只可以投一次')</script>");
}
}
用JS限制留言字数:
<script language="javascript">
function change()
{
//获取评论文本框中的值
var str=document.getElementById('txtContent').value;
//获取当前还可以输入的字符数量
var sum=500-str.length;
//判读是否还可以输入字符
if(sum<=0)
{
//设置Label控件显示文本为红色
document.getElementById('labCount').style.color="Red";
//截取文本框中的字符串，从0位置开始截取，截取到500位
document.getElementById('txtContent').value=document.getElementById('txtContent').value.substring(0,500);
//显示可以输入的字符数量
document.getElementById('labCount').innerHTML=sum;
}else
{
//显示可以输入的字符数量
document.getElementById('labCount').innerHTML=sum;
//设置Label控件的文本颜色
document.getElementById('labCount').style.color="#006FC3";
}
}
</script>
您还可以输入<asp:Label ID="labCount" runat="server" Text="500"></asp:Label>字符
上传视频:
界面:
前台代码:
<table width="500" border="0" cellspacing="0" cellpadding="0" style="border-right: #71add1 1px solid; border-top: #71add1 1px solid; border-left: #71add1 1px solid; border-bottom: #71add1 1px solid;">
<tr>
<td height="36" align="left" valign="middle" background="../images/glsc1_05.jpg" class="b" style="width: 553px"> <span class="hongcu">视频上传</span></td>
</tr>
<tr>
<td valign="top" style="width: 553px; height: 288px;">
<table class="huise1" border="0" cellpadding="0" cellspacing="0" style="width: 490px; height: 218px">
<tr>
<td colspan="2">
</td>
<td colspan="1" style="width: 154px">
</td>
</tr>
<tr>
<td style="width: 127px; text-align: center">
视频标题：</td>
<td style="width: 26px">
<asp:TextBox ID="txtTitle" runat="server"></asp:TextBox></td>
<td style="width: 154px; text-align: left;">
<span style="color: #ff0000">*</span></td>
</tr>
<tr>
<td style="width: 127px; text-align: center">
视频内容：</td>
<td style="width: 26px">
<asp:TextBox ID="txtContent" runat="server" Height="104px" TextMode="MultiLine" Width="207px"></asp:TextBox></td>
<td style="width: 154px; text-align: left;" valign="top">
</td>
</tr>
<tr>
<td style="width: 127px">
上传视频：</td>
<td style="width: 26px; text-align: left">
<asp:FileUpload ID="fileupVideo" runat="server" /></td>
<td style="width: 154px; text-align: left">
<span style="color: #ff0033">
主能上传.flv .avi.wmv</span></td>
</tr>
<tr>
<td style="width: 127px; height: 29px">
视频类型：</td>
<td style="width: 26px; height: 29px; text-align: left">
<asp:RadioButtonList ID="radBtnListType" runat="server" Height="21px" RepeatDirection="Horizontal"
Width="228px">
<asp:ListItem Selected="True">搞笑</asp:ListItem>
<asp:ListItem>体育</asp:ListItem>
<asp:ListItem>电影</asp:ListItem>
<asp:ListItem>动漫</asp:ListItem>
</asp:RadioButtonList></td>
<td style="width: 154px; height: 29px; text-align: left">
</td>
</tr>
<tr>
<td colspan="2">
</td>
<td colspan="1" style="width: 154px">
</td>
</tr>
<tr>
<td colspan="2" style="height: 24px">
<asp:Button ID="btnUpVideo" runat="server" OnClick="btnUpVideo_Click" Text="上 传" />
<asp:Button ID="btnReturn" runat="server" Text="返 回" PostBackUrl="~/user/userIndex.aspx" />
</td>
<td colspan="1" style="width: 154px; height: 24px;">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="center" style="width: 553px; height: 22px;" ></td>
</tr>
<tr>
<td height="4" style="width: 553px"></td>
</tr>
</table>
后台代码:
//上传转换视频，并将相应的信息存到数据库中
protected void btnUpVideo_Click(object sender, EventArgs e)
{
//获取上传文件的名称
string upFileName =fileupVideo.FileName;
//判断是否选择了文件
if (this.fileupVideo.HasFile)
{
//获取文件的扩展名
string upExtension = upFileName.Substring(upFileName.LastIndexOf(".") + 1);
//判断扩展名是否正确
if (checkExtension(upExtension))
{
//获取上传文件所保存的路径
string upFilePath = Server.MapPath("../upFile/") + upFileName;
//将文件保存到指定路径中
fileupVideo.SaveAs(upFilePath);
//获取当前时间
string saveName = DateTime.Now.ToString("yyyyMMddHHmmssffff");
//获取视频转换后所保存的路径及文件名
string playFile = "playFile/" + saveName + ".flv";
//获取图片所保存的路径及名称
string imgFile = "imgFile/" + saveName + ".jpg";
try
{
//判断上传的文件是否为flv格式
if (upExtension == "flv")
{
//如果为flv格式直接保存到指定路径下
File.Copy(fileupVideo.PostedFile.FileName,Server.MapPath("../"+playFile));
//调用公共类中的catchImg方法截取视频图片
operateMethod.catchImg(Server.MapPath("../" + playFile), Server.MapPath("../" + imgFile));
//调用自定义insertVideoInfo方法将视频的信息保存到数据库中
insertVideoInfo(playFile, imgFile);
}
else
{
//调用公共类中的changeVideoType方法转换视频格式
if (operateMethod.changeVideoType(upFileName, Server.MapPath("../") + playFile, Server.MapPath("../") + imgFile))
{
//调用自定义insertVideoInfo方法将视频信息保存到数据库中
insertVideoInfo(playFile,imgFile);
//删除上传的视频
File.Delete(upFilePath);
}
else
{
RegisterStartupScript("false", "<script>alert('上传失败！')</script>");
//删除上传的视频
File.Delete(upFilePath);
}
}
}
catch (Exception ex)
{
Response.Write(ex.Message.ToString());
}
}
else {
RegisterStartupScript("false", "<script>alert('文件格式错误！')</script>");
}
}
}
//将视频信息存储到数据库中
private void insertVideoInfo(string playFileh, string imgFile)
{
//获取用户名
string userName =Session["userName"].ToString();
//获取视频名称
string videoTitle = txtTitle.Text;
//获取视频内容
string videoContent = txtContent.Text;
//获取当前时间
string date = DateTime.Now.ToString();
//获取视频路径
string videoPath = playFileh;
//获取图片路径
string videoPicture = imgFile;
//获取视频的类型
string videoType = "";
int count = radBtnListType.Items.Count;
for (int i = 0; i < count; i++)
{
if (radBtnListType.Items[i].Selected)
{
videoType = radBtnListType.Items[i].Value;
break;
}
}
//编写SQL语句将视频的详细信息添加到数据库中
string sqlInsert = "insert into videoInfo values('" + userName + "','" + videoTitle + "','" + videoContent + "','" + date + "','" + videoPath + "','" + videoPicture + "','" + videoType + "','','','','','')";
if (operateData.execSql(sqlInsert))
{
RegisterStartupScript("true", "<script>alert('上传成功！')</script>");
//编写SQL语句将当前用户的积分增加
string sqlUpd=" update userInfo set sumMark=sumMark+100 where userName='"+userName+"'" ;
operateData.execSql(sqlUpd);
}else RegisterStartupScript("true", "<script>alert('上传失败！')</script>");
}
//自定义方法判断视频格式是否正确
private bool checkExtension(string extension)
{
string[] videoExtension = new string[] { "flv", "avi", "wmv", };
bool strReturn =false;
//遍历数组判断当前上传的视频格式是否正确
foreach (string var in videoExtension)
{
if (var == extension)
{
strReturn = true; break;
}
}
return strReturn;
}
}
类中相关方法:
/// <summary>
/// 对视频进行图片截取
/// </summary>
/// <param name="fileName">需要截取图片的视频路径</param>
/// <param name="imgFile">截取图片后保存的图片路径</param>
public static void catchImg(string fileName,string imgFile)
{
//获取截图工具路径
string ffmpeg = System.Web.HttpContext.Current.Server.MapPath("../") + ffmpegtool;
//获取截图后保存的路径
string flv_img = imgFile;
//获取截取图片的大小
string FlvImgSize = sizeOfImg;
Process pss = new Process();
//设置启动程序的路径
pss.StartInfo.FileName = ffmpeg;
pss.StartInfo.Arguments = " -i " + fileName + " -y -f image2 -ss 2 -vframes 1 -s " + FlvImgSize + " " + flv_img;
//启动进程
pss.Start();
}
//获取转换工具路径
public static string ffmpegtool = ConfigurationManager.AppSettings["ffmpeg"];
//获取视频的文件夹名
public static string upFile = "upfile/";
//获取图片文件的文件夹名
public static string imgFile = "imgFile/";
//获取转换后文件的文件夹名
public static string playFile = "playFile/";
//文件图片大小
public static string sizeOfImg = ConfigurationManager.AppSettings["imgSize"];
//文件大小
public static string widthOfFile = ConfigurationManager.AppSettings["widthSize"];
public static string heightOfFile = ConfigurationManager.AppSettings["heightSize"];
/// <summary>
/// 将视频文件转换成flv格式，并保存到playFile文件夹下
/// </summary>
/// <param name="fileName">需要转换视频的路径</param>
/// <param name="playFile">视频转换flv格式后保存的路径</param>
/// <param name="imgFile">在视频文件中抓取图片后保存路径</param>
/// <returns>成功:返回图片虚拟地址; 失败:返回空字符串</returns>
public static bool changeVideoType(string fileName, string playFile, string imgFile)
{
//获取视频转换工具的路径
string ffmpeg= System.Web.HttpContext.Current.Server.MapPath("../") + ffmpegtool;
//获取需要转换的视频路径
string Name = System.Web.HttpContext.Current.Server.MapPath("../") + upFile + "/" + fileName;
if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(Name)))
{
return false;
}
//获取视频转换后需要保存的路径
string flv_file = playFile;
//创建Process对象
Process pss = new Process();
//不显示窗口
pss.StartInfo.CreateNoWindow = false;
//设置启动程序的路径
pss.StartInfo.FileName = ffmpeg;
//设置执行的参数
pss.StartInfo.Arguments = " -i " + Name + " -ab 128 -ar 22050 -qscale 6 -r 29.97 -s " + widthOfFile + "x" + heightOfFile + " " + flv_file;
try
{
//启动转换工具
pss.Start();
while (!pss.HasExited)
{
continue;
}
//截取视频的图片
catchImg(Name, imgFile);
System.Threading.Thread.Sleep(4000);
if (!File.Exists(imgFile))
{
File.Copy(System.Web.HttpContext.Current.Server.MapPath("../") + "imgHead\\default.gif", imgFile);
}
return true;
}
catch
{
return false;
}
}