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protected void Page_Load(object sender, EventArgs e) { if (Request.QueryString["ID"] != null && Request.QueryString["ID"].Length > 0) { .................. } else if (Request.QueryString["Transform"] != null) { int index; string column; ResolveParams(Request.QueryString["Transform"], out index, out column); if (index != -1) { Employee data = GetData(index); MemoryStream ms = ResolveTransform(data, column); if (ms != null) { Response.Clear(); Response.BufferOutput = true; Response.ContentType = "image/bmp"; Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length); ms.Dispose(); Response.Flush(); Response.End(); } else Response.End(); } } } private void ResolveParams(string transformParams, out int index, out string column) { string[] p = Request.QueryString["Transform"].Split('*'); index = -1; column = string.Empty; if (p.Length == 2) { index = int.Parse(p[0]); column = p[1]; } } private MemoryStream ResolveTransform(object data, string column) { PropertyInfo pi = data.GetType().GetProperty(column); if (pi != null) return GetDBCSJPEStream(pi.GetValue(data,null).ToString(), new Font("PMingLiU", 11,FontStyle.Bold), Color.Black, Color.White, 280,24); return null; } private MemoryStream GetDBCSJPEStream(string str, Font font, Color foreColor, Color background, int width, int height) { Bitmap bmp = new Bitmap(width, height); Graphics g = Graphics.FromImage(bmp); Brush bFore = new SolidBrush(foreColor); Brush bBack = new SolidBrush(background); g.Clear(Color.Transparent); g.DrawString(str, font, bFore, 2, 2); bFore.Dispose(); bBack.Dispose(); MemoryStream ms = new MemoryStream(); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png); bmp.Dispose(); ms.Position = 0; return ms; } |
< Canvas xmlns = "http://schemas.microsoft.com/client/2007" ................... < Image Name = "imgLastName"Tag="BindingField:LastName;BindingProperty:Source;Format:Default.aspx?Transform={INDEX}*{BindingField}"Width="300"Height="24"Canvas.Left="500"Canvas.Top="23" /> Canvas> |
/ // Silverlight Data Binding Helper 0.1 / if (!window.SilverlightBinding) window.SilverlightBinding = {}; SilverlightBinding.BindingData = function(ctrl,bindingExpression,context) { var bindings = bindingExpression.split(';'); this.bindingComplete = false; this.ctrl = ctrl; this.context = context; for(var i = 0; i < bindings.length; i++) { var temp = bindings[i].split(':'); if(temp.length != 2) { this.bindingComplete = false; return; } if(temp[0] == 'BindingField') this.bindingField = temp[1]; else if(temp[0] == 'BindingProperty') this.bindingProperty = temp[1]; else if(temp[0] == 'Format') this.format = temp[1]; } this.bindingComplete = true; } SilverlightBinding.BindingData.prototype = { updateValue : function(dataItem) { if(this.bindingComplete) { if(this.format) { var str = eval("this.format.replace('{0}',dataItem."+this.bindingField+');'); if(this.format.indexOf("INDEX") != -1) str = str.replace("{INDEX}",this.context.currentDataIndex); if(this.format.indexOf("BindingField") != -1) str = str.replace("{BindingField}",this.bindingField); eval('this.ctrl.'+this.bindingProperty+" = str;"); } else eval('this.ctrl.'+this.bindingProperty+' = dataItem.'+this.bindingField+';'); } } } SilverlightBinding.BindingContext = function(bindingContainer) { var parseBindings = bindingContainer.tag.split(';'); this.bindingComplete = false; this.bindingContainer = bindingContainer; this.bindingControls = new Array(); this.currentDataIndex = 0; this.recordCount = 0; for(var i = 0; i < parseBindings.length; i++) { var parseBinding = parseBindings[i].split(':'); if(parseBinding[0] == "BindingContext") { var bindingMethods = parseBinding[1].split(','); if(bindingMethods.length == 2) { this.bindingMethod = bindingMethods[0]; this.bindingCountMethod = bindingMethods[1]; this.bindingComplete = true; } } } if(!this.bindingComplete) alert('ERROR,Binding Failed.'); } SilverlightBinding.BindingContext.prototype = { _childWorker : function(parent,parseParent) { if(parent.tag && parent.tag != '') { if(parseParent) { var bindingData = new SilverlightBinding.BindingData(parent,parent.tag,this); if(bindingData.bindingComplete) { this.bindingControls.length++; this.bindingControls[this.bindingControls.length-1] = bindingData; } else delete bindingData; } try { var temp = parent.children; } catch(err) { return; } for(var i = 0; i < parent.children.count; i++) this._childWorker(parent.children.getItem(i),true); } }, initialize:function() { this._childWorker(this.bindingContainer,false); this._receiveCount(); this._receiveData(0); }, OnSucceeded: function(result, userContext, methodName) { if (methodName == userContext.bindingMethod) { for(var i = 0; i < userContext.bindingControls.length; i++) userContext.bindingControls[i].updateValue(result); } else if(methodName == userContext.bindingCountMethod) userContext.recordCount = result; }, OnFailed:function(error, userContext, methodName) { if(error !== null) { alert(error.get_message()); } }, _receiveData: function(index) { eval('PageMethods.'+this.bindingMethod+'(index,this.OnSucceeded,this.OnFailed,this);'); }, _receiveCount: function() { eval('PageMethods.'+this.bindingCountMethod+'(this.OnSucceeded,this.OnFailed,this);'); }, next:function() { if(this.currentDataIndex+1 >= this.recordCount) return; this._receiveData(++this.currentDataIndex); }, prev:function() { if(this.currentDataIndex -1 < 0) return; this._receiveData(--this.currentDataIndex); } } |
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