ASP.NET项目申报系统-5.3~5.4（FileUpload和GridView用法）

5.3

GridView中，某列的内容超过它的长度后显示省略号（...）而不是把GridView撑大。
关键点是GridView的CssClass和ItemStyle中的CssClass。

页面前台：

<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0 style="font-size:small">
<tr>
<td align="center">
<asp:GridView ID="GridViewDown" runat="server" ShowHeader="false"  ShowFooter="false" AllowPaging="true" PageSize="6"
AutoGenerateColumns="False" BorderWidth="0" Width="98%" GridLines="None" CssClass="GridViewCSS"
style="margin-bottom: 0px">
<PagerSettings Visible="false"/>
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Image ID="Imagelist" runat="server" ImageUrl="~/Images/homepage/list.gif" />
</ItemTemplate>
</asp:TemplateField>
<asp:HyperLinkField DataTextField="FileName" DataNavigateUrlFields="FileName" DataNavigateUrlFormatString="../Upload/Down/{0}">
<ItemStyle Width="96%" CssClass="content" />
</asp:HyperLinkField>
</Columns>
</asp:GridView>

</td>
</tr>
</TABLE>

Css文件：

.GridViewCSS
{
table-layout: fixed;/*重要*/
text-align:center;
}
.content
{
text-align:left;
width:100%;
/*下面三条重要*/
overflow:hidden;
white-space:nowrap;
text-overflow:ellipsis; /*显示省略号*/
}

5.4

FileUpload的用法：

页面前台：

<asp:HiddenField ID="HiddenFieldfilename" runat="server" />
<table  cellspacing="0" cellpadding="0" class="TableMain">

<tr>
<td height="24px"class="TableLineItem" colspan="4">
<span style="color:White;font-size:medium"> 申报单位信息附件上传</span>
</td>
</tr>

<tr>
<td class="TD1" rowspan="2">企业法人营业执照</td>
<td>
<asp:FileUpload ID="FileUpload1" runat="server" Size="50"/>
</td>
<td width="30px">
<asp:Button ID="ButtonUpload1" runat="server" Text="上传" OnClientClick="return beforeUploadUnit(1);"
onclick="ButtonUpload1_Click"/>
</td>
<td width="30px">
</td>
</tr>
<tr>
<td class="TDBottom">
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</td>
<td width="30px" class="TDBottom">
<asp:Button ID="ButtonDown1" runat="server" Text="下载" Visible="false"
onclick="ButtonDown1_Click"/>
</td>
<td width="30px" class="TDBottom">
<asp:Button ID="ButtonDelete1" runat="server" Text="删除"
onclick="ButtonDelete1_Click" Visible="false"/>

</td>
</tr>

...

</table>

JavaScript代码：

function beforeUploadUnit(obj) {
var file = document.getElementById("FileUpload" + obj).value;
var fileArray = file.split('\\');
var filename = fileArray[fileArray.length - 1];

//限制上传附件的类型
var suffix = filename.substring(filename.lastIndexOf(".") + 1);
if (suffix != "pdf" && suffix != "doc" && suffix != "docx" && suffix != "xls" && suffix != "xlsx" && suffix != "rar" && suffix != "zip") {
alert("上传文件的格式不合格，请重新上传！");
return false;
}
//限制上传文件名的长度
if (filename.length > 45) {
alert("上传文件的名称不能长于45个字符！");
return false;
}
//限制上传文件不能同名
var nameinfo = document.getElementById("HiddenFieldfilename").value;
var nameArray = nameinfo.split('|');
for (var i = 0; i < nameArray.length; i++) {
if (nameArray[i] == filename) {
break;
}
}
if (i < nameArray.length) {
alert("上传文件不能同名，请修改后再上传！");
return false;
}

return true;
}

后台代码：

//Page_Onload里面进行初始化

//修改HiddenFieldfilename的值
private void removeFileName(string filename)
{

int startIndex = HiddenFieldfilename.Value.IndexOf(filename);
if (startIndex == 0)
{
if (filename.Length == HiddenFieldfilename.Value.Length)
{
HiddenFieldfilename.Value = "";
}
else
{
HiddenFieldfilename.Value = HiddenFieldfilename.Value.Remove(startIndex, filename.Length);
}
}
else
{
HiddenFieldfilename.Value = HiddenFieldfilename.Value.Remove(startIndex - 1, filename.Length + 1);
}
}
//修改HiddenFieldfilename的值
private void addFileName(string filename)
{
if (HiddenFieldfilename.Value == "")
{
HiddenFieldfilename.Value = filename;
}
else
{
HiddenFieldfilename.Value += "|" + filename;
}
}

protected void ButtonDelete1_Click(object sender, EventArgs e)
{
if (Label1.Text != "")
{
string id = Session["UnitID"].ToString();
string file = Server.MapPath("~/Upload/UnitAccessory") + "\\" + id + Label1.Text;
//获取文件属性
FileAttributes attrs = File.GetAttributes(file);
// 下面表达式中的 1 是 FileAttributes.ReadOnly 的值
// 此表达式是把 ReadOnly 所在的位改成 0
attrs = (FileAttributes)((int)attrs & ~(1));
File.SetAttributes(file, attrs);
File.Delete(file);
//修改HiddenFieldfilename
removeFileName(Label1.Text);
//对数据库中的值进行更新，没有附件的时候，就删除所对应的table
UnitAccessoryManage accessManage = new UnitAccessoryManage();
if (HiddenFieldfilename.Value == "")
{
accessManage.Delete(id);
}
else
{
UnitAccessory access = accessManage.GetModel(id);
access.LegalLicense = null;
accessManage.Update(access);
}
Label1.Text = "";
ButtonDelete1.Visible = false;
ButtonDown1.Visible = false;
FileUpload1.Enabled = true;
ButtonUpload1.Enabled = true;
}
}
protected void ButtonUpload1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string fileFormat = FileUpload1.FileName.Substring(FileUpload1.FileName.LastIndexOf(".")+1);
//alert中显示aspx中定义的变量
//ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(' "+fileFormat+" ')</script>");
if (fileFormat != "doc" && fileFormat != "docx" && fileFormat != "xls" && fileFormat != "xlsx" && fileFormat != "pdf" && fileFormat != "rar" && fileFormat != "zip")
{
ClientScript.RegisterStartupScript(this.GetType(),"","<script>alert('上传文件格式不正确，请重新上传！')</script>");
return;
}
if (FileUpload1.PostedFile.ContentLength> 6 * 1024 * 1024)
{
ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('上传文件大小不能超过4MB，请重新上传！')</script>");
return;
}
string id = Session["UnitID"].ToString();
string filePath = Server.MapPath("~/Upload/UnitAccessory");
string filename = FileUpload1.FileName;
if (filename.Length > 45)
{
ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('上传文件名称不能长于40个字符，请重命名后再上传！')</script>");
return;
}
string file = filePath + "\\" + id + filename;
if (File.Exists(file))
{
FileAttributes attrs = File.GetAttributes(file);
attrs = (FileAttributes)((int)attrs & ~(1));
File.SetAttributes(file, attrs);
}
UnitAccessoryManage accessManage = new UnitAccessoryManage();
UnitAccessory access;
try
{
FileUpload1.SaveAs(file);
if (accessManage.Exists(id))
{
access = accessManage.GetModel(id);
access.LegalLicense = filename;
accessManage.Update(access);
}
else
{
access = new UnitAccessory();
access.UnitID = id;
access.LegalLicense = filename;
accessManage.Add(access);
}
Label1.Text = filename;
ButtonDelete1.Visible = true;
ButtonDown1.Visible = true;
FileUpload1.Enabled = false;
ButtonUpload1.Enabled = false;
//修改HiddenFieldfilename
addFileName(filename);
}
catch (Exception ex)
{
Label1.Text = "出错:" + ex.Message.ToString();
}
}
}