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<%@ Control Language="C#"
AutoEventWireup="true"
CodeFile="widget.ascx.cs"
Inherits="Widgets.YahooIMGnews.Widget"
%><ol runat="server"
id="olLinks"
/><div> <ul runat="server"
id="ulLinks"
/> <a class="left"
href="#"> <span class="glyphicon glyphicon-chevron-left"></span> </a> <a class="right"
href="#"> <span class="glyphicon glyphicon-chevron-right"></span> </a></div><script type="text/javascript">$("ul > li[data-id]").hover( function () { $(‘li[data-id]‘).removeClass("active"); $(‘ol > li[data-id=‘
+ $(this).attr("data-id") + ‘]‘).addClass("active"); $(this).addClass("active"); }, function () { $(this).addClass("active"); })</script> |
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namespace
Widgets.YahooIMGnews { using
App_Code.Controls; using
BlogEngine.Core; using
System; using
System.Xml; /// <summary> /// 部件 /// </summary> public
partial class Widget : WidgetBase { #region 属性 /// <summary> /// 获取一个值,该值指示部件是否是可编辑的。 /// 可以编辑 /// </summary> public
override bool IsEditable { get
{ return
true; } } /// <summary> /// 小部件的名称。 /// Default IMGNews MainTop /// 与目录名称必须一致 /// </summary> public
override string Name { get
{ return
"YahooIMGnews"; } } #endregion #region 公共方法 /// <summary> /// 该方法代替Page_Load工作。 /// 使用这种方法代替Page_Load数据绑定等。 /// </summary> public
override void LoadWidget() { var
settings = this.GetSettings(); var
doc = new
XmlDocument(); if
(settings["content"] != null) { doc.InnerXml = settings["content"]; } var
links = doc.SelectNodes("//link"); if
(links == null) { return; } if
(links.Count == 0) { this.Visible = false; } else
{ string
active = "active"; int
i = 0; foreach
(XmlNode node in
links) { this.olLinks.InnerHtml += String.Format( "<li data-id=\"{7}\" class=\"{0}\"><a href=\"{4}\" target=\"_blank\"><img src=\"{1}{2}/{3}\" /></a><div><h4><a href=\"{4}\" target=\"_blank\">{5}</a></h4><p>{6}</p></div></li>", active, Utils.ApplicationRelativeWebRoot, settings["imagefolder"], node.Attributes["img"].InnerText, node.Attributes["url"].InnerText, node.Attributes["title"].InnerText, node.Attributes["explain"].InnerText, i ); this.ulLinks.InnerHtml += String.Format( "<li data-id=\"{6}\" class=\"{0}\"><a href=\"{4}\" target=\"_blank\"><img src=\"{1}{2}/{3}\" /><p>{5}</p></a></li>", active, Utils.ApplicationRelativeWebRoot, settings["imagefolder"], ThumbFileName(node.Attributes["img"].InnerText), node.Attributes["url"].InnerText, node.Attributes["title"].InnerText, i ); active = ""; ++i; } } } #endregion #region 私有方法 缩略图文件名 /// <summary> /// 缩略图文件名 /// </summary> private
string ThumbFileName(string
fileName) { var
fInfo = new
System.IO.FileInfo(fileName); return
fileName.Replace(fInfo.Extension, "_thumb"
+ fInfo.Extension); } #endregion }} |
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edit.ascx<%@ Control Language="C#"
AutoEventWireup="true"
CodeFile="edit.ascx.cs"
Inherits="Widgets.YahooIMGnews.Edit"
%><div class="form-horizontal"> <div class="form-group"> <label for="<%=txtTitle.ClientID %>"
class="col-sm-2 control-label">文章标题:</label> <div class="col-sm-7"> <asp:TextBox ID="txtTitle"
class="form-control"
runat="server"
placeholder="文章标题"></asp:TextBox> </div> <div class="col-sm-3"> <p class="form-control-static"> <asp:RequiredFieldValidator runat="Server"
ControlToValidate="txtTitle"
ErrorMessage="请输入标题"
ValidationGroup="add"
/> </p> </div> </div> <div class="form-group"> <label for="<%=txtExplain.ClientID %>"
class="col-sm-2 control-label">文章说明:</label> <div class="col-sm-7"> <textarea runat="server"
id="txtExplain"
class="form-control"
rows="3"
placeholder="文章说明（简介）"></textarea> </div> <div class="col-sm-3"> <p class="form-control-static"> <asp:RequiredFieldValidator runat="Server"
ControlToValidate="txtExplain"
ErrorMessage="请输入文章说明（简介）"
ValidationGroup="add"
/> </p> </div> </div> <div class="form-group"> <label for="<%=txtUrl.ClientID %>"
class="col-sm-2 control-label">文章链接:</label> <div class="col-sm-7"> <asp:TextBox ID="txtUrl"
class="form-control"
runat="server"
placeholder="Url"></asp:TextBox> </div> <div class="col-sm-3"> <p class="form-control-static"> <asp:RegularExpressionValidator runat="Server"
ControlToValidate="txtUrl"
ValidationExpression="(http://|https://|)([\w-]+\.)+[\w-]+(/[\w- ./?%&=;~]*)?" ErrorMessage="请输入有效的网址"
ValidationGroup="add"
/> </p> </div> </div> <div class="form-group"> <label for="<%=txtUploadImage.ClientID %>"
class="col-sm-2 control-label">图片上传:</label> <div class="col-sm-4"> <asp:FileUpload runat="server"
ID="txtUploadImage"
/> <p class="help-block">上传图片请先修改大小、宽高.</p> </div> <div class="col-sm-1"> <label for="<%=txtUrl.ClientID %>">图宽：</label> <asp:TextBox ID="txtWidth"
class="form-control"
runat="server"
placeholder="数字"></asp:TextBox> </div> <div class="col-sm-1"> <label for="<%=txtHeight.ClientID %>">图高：</label> <asp:TextBox ID="txtHeight"
class="form-control"
runat="server"
placeholder="数字"></asp:TextBox> </div> <div class="col-sm-1"> <label for="<%=txtMaxItems.ClientID %>">数量：</label> <asp:TextBox ID="txtMaxItems"
class="form-control"
runat="server"
placeholder="数字"></asp:TextBox> </div> <div class="col-sm-2"> <label for="<%=txtImageFolder.ClientID %>">保存目录：</label> <asp:TextBox ID="txtImageFolder"
class="form-control"
runat="server"
Text="Content/IMGNews"
ReadOnly="True"
placeholder="路径"></asp:TextBox> </div> </div> <div class="form-group"> <div class="col-sm-offset-2 col-sm-10"> <asp:Button runat="server"
CssClass="btn btn-default"
ID="btnAdd"
Text="添加"
/> </div> </div></div><div class="table-responsive"> <asp:GridView runat="server"
ID="grid"
AutoGenerateColumns="False"
AutoGenerateDeleteButton="True"
AutoGenerateEditButton="True"
CssClass="table"> <Columns> <asp:TemplateField HeaderText="图片"> <ItemTemplate> <img src="/Content/IMGNews/<%# thumbName(Eval("img").ToString()) %>"
/> </ItemTemplate> <EditItemTemplate> <asp:TextBox runat="server"
ID="txtImg"
Text=‘<%# Eval("img") %>‘
/> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="文章标题"> <ItemTemplate> <%# Eval("title") %> </ItemTemplate> <EditItemTemplate> <asp:TextBox runat="server"
ID="txtTitle"
Text=‘<%# Eval("title") %>‘
/> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="文章说明"> <ItemTemplate> <%# Eval("explain") %> </ItemTemplate> <EditItemTemplate> <asp:TextBox runat="server"
ID="txtExplain"
Text=‘<%# Eval("explain") %>‘
/> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="文章链接 Url"> <ItemTemplate> <%# Eval("url")%> </ItemTemplate> <EditItemTemplate> <asp:TextBox runat="server"
ID="txtUrl"
Text=‘<%# Eval("url") %>‘
/> </EditItemTemplate> </asp:TemplateField> </Columns> </asp:GridView></div> |
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namespace
Widgets.YahooIMGnews { using
App_Code.Controls; using
BlogEngine.Core; using
System; using
System.Data; using
System.Drawing; using
System.IO; using
System.Web.UI.WebControls; using
System.Xml; /// <summary> /// YahooIMGnews 窗体小部件的设置与编辑. /// </summary> public
partial class Edit : WidgetEditBase { #region 公共方法 /// <summary> /// 将此基本小部件设置如标题。 /// </summary> public
override void Save() { this.Doc(); } #endregion #region 方法 /// <summary> /// 获取XML文档。 /// </summary> /// <returns>XML文档。</returns> private
XmlDocument Doc() { var
settings = this.GetSettings(); var
doc = new
XmlDocument(); if
(settings["content"] != null) { doc.InnerXml = settings["content"]; } return
doc; } /// <summary> /// 加载事件 <see cref="E:System.Web.UI.Control.Load"/> /// </summary> /// <param name="e">这个 <see cref="T:System.EventArgs"/> 事件包含的数据.</param> protected
override void OnLoad(EventArgs e) { base.OnLoad(e); if
(!this.Page.IsPostBack) { this.BindGrid(); } this.grid.RowEditing += this.GridRowEditing; this.grid.RowUpdating += this.GridRowUpdating; this.grid.RowCancelingEdit += (o, args) => this.grid.EditIndex = -1; this.grid.RowDeleting += this.GridRowDeleting; this.btnAdd.Click += this.BtnAddClick; var
settings = this.GetSettings(); this.txtWidth.Text = settings.ContainsKey("imagewidth") == true
? settings["imagewidth"] : "704.5"; this.txtHeight.Text = settings.ContainsKey("imageheight") == true
? settings["imageheight"] : "250"; this.txtMaxItems.Text = settings.ContainsKey("imagemaxitems") == true
? settings["imagemaxitems"] : "50"; } /// <summary> /// 表格中删除事件。 /// </summary> /// <param name="sender"> /// 这一事件的来源。 /// </param> /// <param name="e"> /// 这个 <see cref="System.Web.UI.WebControls.GridViewDeleteEventArgs"/> 事件包含的数据。 /// </param> private
void GridRowDeleting(object
sender, GridViewDeleteEventArgs e) { var
doc = this.Doc(); var
row = this.grid.DataKeys[e.RowIndex]; if
(row != null) { var
id = (string)row.Value; var
node = doc.SelectSingleNode(string.Format("//link[@id=\"{0}\"]", id)); if
(node == null) { return; } if
(node.ParentNode != null) { node.ParentNode.RemoveChild(node); } } this.Save(doc); this.BindGrid(); } /// <summary> /// 表格中更新事件。 /// </summary> /// <param name="sender"> /// 这一事件的来源。 /// </param> /// <param name="e"> /// 这个 <see cref="System.Web.UI.WebControls.GridViewUpdateEventArgs"/> 事件包含的数据。 /// </param> private
void GridRowUpdating(object
sender, GridViewUpdateEventArgs e) { var
doc = this.Doc(); var
row = this.grid.DataKeys[e.RowIndex]; if
(row != null) { var
id = (string)row.Value; var
textboxImg = (TextBox)this.grid.Rows[e.RowIndex].FindControl("txtImg"); var
textboxTitle = (TextBox)this.grid.Rows[e.RowIndex].FindControl("txtTitle"); var
textboxExplain = (TextBox)this.grid.Rows[e.RowIndex].FindControl("txtExplain"); var
textboxUrl = (TextBox)this.grid.Rows[e.RowIndex].FindControl("txtUrl"); var
node = doc.SelectSingleNode(string.Format("//link[@id=\"{0}\"]", id)); if
(node == null) { return; } if
(node.Attributes != null) { node.Attributes["img"].InnerText = textboxImg.Text.Trim(); node.Attributes["title"].InnerText = textboxTitle.Text.Trim(); node.Attributes["explain"].InnerText = textboxExplain.Text.Trim(); node.Attributes["url"].InnerText = textboxUrl.Text.Trim(); } } this.grid.EditIndex = -1; this.Save(doc); this.BindGrid(); } /// <summary> /// 表格中编辑事件 /// </summary> /// <param name="sender"> /// 这一事件的来源。 /// </param> /// <param name="e"> /// 这个 <see cref="System.Web.UI.WebControls.GridViewEditEventArgs"/> 事件包含的数据。 /// </param> private
void GridRowEditing(object
sender, GridViewEditEventArgs e) { this.grid.EditIndex = e.NewEditIndex; this.BindGrid(); } /// <summary> /// 填充数据。 /// </summary> private
void BindGrid() { var
doc = this.Doc(); var
list = doc.SelectNodes("//link"); if
(list == null
|| list.Count <= 0) { return; } using
(var
reader = new
XmlTextReader(doc.OuterXml, XmlNodeType.Document, null)) { var
ds = new
DataSet(); ds.ReadXml(reader); this.grid.DataSource = ds; this.grid.DataKeyNames = new[] { "id"
}; this.grid.DataBind(); ds.Dispose(); } } /// <summary> /// 保存指定的xml文档。 /// </summary> /// <param name="doc">The xml document.</param> private
void Save(XmlNode doc) { var
settings = this.GetSettings(); settings["ImageWidth"] = this.txtWidth.Text.Trim(); // 图片宽度 settings["ImageHeight"] = this.txtHeight.Text.Trim(); // 图片高度 settings["ImageMaxItems"] = this.txtMaxItems.Text.Trim(); // 最大展示图片数量 settings["ImageFolder"] = this.txtImageFolder.Text.Trim(); // 图片文件存储目录 settings["content"] = doc.InnerXml; this.SaveSettings(settings); } /// <summary> /// 处理单击事件btnAdd。 /// 添加事件 /// </summary> /// <param name="sender">这一事件的来源。</param> /// <param name="e">这个 <see cref="System.EventArgs"/> 事件包含的数据。</param> private
void BtnAddClick(object
sender, EventArgs e) { //判断上传控件中是否有值 if
(this.txtUploadImage.HasFile == false) { Response.Write("<script>alert(‘没有选择图片‘)</script>"); } else
{ string
fType = txtUploadImage.PostedFile.ContentType;//获取图像的类型 if
(fType == "image/bmp"
|| fType == "image/gif"
|| fType == "image/pjpeg"
|| fType == "image/jpeg"
|| fType == "image/x-png"
|| fType == "image/png") { try
{ var
doc = this.Doc(); var
links = doc.SelectSingleNode("links"); if
(links == null) { links = doc.CreateElement("links"); doc.AppendChild(links); } XmlNode link = doc.CreateElement("link"); var
id = doc.CreateAttribute("id"); id.InnerText = Guid.NewGuid().ToString(); if
(link.Attributes != null) { link.Attributes.Append(id); } // img var
img = doc.CreateAttribute("img"); img.InnerText = this.txtUploadImage.FileName.ToLowerInvariant(); Upload();// 私有方法 文件上传 if
(link.Attributes != null) { link.Attributes.Append(img); } // title var
title = doc.CreateAttribute("title"); title.InnerText = this.txtTitle.Text.Trim(); if
(link.Attributes != null) { link.Attributes.Append(title); } // explain var
explain = doc.CreateAttribute("explain"); explain.InnerText = this.txtExplain.Value.Trim(); if
(link.Attributes != null) { link.Attributes.Append(explain); } //url var
url = doc.CreateAttribute("url"); url.InnerText = this.txtUrl.Text.Trim(); if
(link.Attributes != null) { link.Attributes.Append(url); } links.AppendChild(link); this.Save(doc); this.BindGrid(); } catch
(Exception ex) { Utils.Log("YahooIMGnews-编辑页面-添加", ex); } } else
{ Response.Write("<script>alert(‘图片格式出错‘);</script>"); } } } #endregion #region 私有方法 文件上传 /// <summary> /// 文件上传 /// </summary> private
void Upload() { // 图片保存绝对全路径 文件夹 var
folder = Server.MapPath(Utils.ApplicationRelativeWebRoot + this.txtImageFolder.Text.Trim()); // 图片保存绝对全路径 文件名称 var
fileName = Path.Combine(folder, txtUploadImage.FileName.ToLowerInvariant()); // 判断文件目录是否存在，不存在就建立。 if
(!Directory.Exists(folder)) Directory.CreateDirectory(folder); // 判断当前文件是否有预上传同名文件，有就删除。 if
(File.Exists(fileName)) File.Delete(fileName); // 保存文件 txtUploadImage.PostedFile.SaveAs(fileName); // 生成缩略图 MakeThumbnail(fileName, thumbName(fileName), 130, 48, "HW"); //System.Drawing.Image image = System.Drawing.Image.FromFile(fileName); //System.Drawing.Image thumb = image.GetThumbnailImage(130, 48, () => false, IntPtr.Zero); // 保存缩略图文件 //thumb.Save(thumbName); } /// <summary> /// 缩略图文件名 /// </summary> /// <param name="fileName"></param> /// <returns></returns> public
string thumbName(string
fileName) { var
fInfo = new
System.IO.FileInfo(fileName); return
fileName.Replace(fInfo.Extension, "_thumb"
+ fInfo.Extension); } /// <summary> /// 生成缩略图 /// </summary> /// <param name="originalImagePath">源图路径（物理路径）</param> /// <param name="thumbnailPath">缩略图路径（物理路径）</param> /// <param name="width">缩略图宽度</param> /// <param name="height">缩略图高度</param> /// <param name="mode">生成缩略图的方式</param> private
void MakeThumbnail(string
originalImagePath, string
thumbnailPath, int
width, int
height, string
mode) { // 判断当前文件是否有预上传同名缩略图文件，有就删除。 if
(File.Exists(thumbnailPath)) File.Delete(thumbnailPath); System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath); int
towidth = width; int
toheight = height; int
x = 0; int
y = 0; int
ow = originalImage.Width; int
oh = originalImage.Height; switch
(mode) { case
"HW"://指定高宽缩放（可能变形） break; case
"W"://指定宽，高按比例 toheight = originalImage.Height * width / originalImage.Width; break; case
"H"://指定高，宽按比例 towidth = originalImage.Width * height / originalImage.Height; break; case
"Cut"://指定高宽裁减（不变形） if
((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight) { oh = originalImage.Height; ow = originalImage.Height * towidth / toheight; y = 0; x = (originalImage.Width - ow) / 2; } else
{ ow = originalImage.Width; oh = originalImage.Width * height / towidth; x = 0; y = (originalImage.Height - oh) / 2; } break; default: break; } //新建一个bmp图片 System.Drawing.Image bitmap = new
System.Drawing.Bitmap(towidth, toheight); //新建一个画板 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap); //设置高质量插值法 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; //设置高质量,低速度呈现平滑程度 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //清空画布并以透明背景色填充 g.Clear(Color.Transparent); //在指定位置并且按指定大小绘制原图片的指定部分 g.DrawImage(originalImage, new
Rectangle(0, 0, towidth, toheight), new
Rectangle(x, y, ow, oh), GraphicsUnit.Pixel); try
{ //以jpg格式保存缩略图 bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg); } catch
(System.Exception e) { throw
e; } finally
{ originalImage.Dispose(); bitmap.Dispose(); g.Dispose(); } } #endregion }} |
BlogEngine2.9模仿yahoo滚动新闻Widget,布布扣,bubuko.com
BlogEngine2.9模仿yahoo滚动新闻Widget
原文：http://www.cnblogs.com/51j/p/3608877.html