FluidMoveBehavior

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custom drag drop in silverlight

custom drag drop in silverlight

#region custom Drag Drop

double _horizDrag = 0;

double _vertDrag = 0;

double _mouseVerticalPosition;

double _mouseHorizontalPosition;

bool _captured = false;

bool _isDragStart = false;

private void EndDragPopupMouseLeftUp()

{

_horizDrag = _vertDrag = 0;

_captured = false;

popupContent.Content = null;

popupContent.ContentTemplate = null;

//popup1.ReleaseMouseCapture();

_mouseVerticalPosition = -1;

_mouseHorizontalPosition = -1;

var ts = new ThreadStart(DragHold);

// create new thread

var thrd = new Thread(ts);

// start thread

thrd.Start();

}

public void DragHold()

{

// makes the main thread sleep - let sub thread to run

Thread.Sleep(100);

//if (!IsOver)

_isDragStart = false;

}

private void MoveDragPopupMouseMove(MouseEventArgs e)

{

if (_captured)

{

// Calculate the current position of the object.

double deltaV = e.GetPosition(null).Y - _mouseVerticalPosition;

double deltaH = e.GetPosition(null).X - _mouseHorizontalPosition;

_horizDrag += deltaH;

_vertDrag += deltaV;

double newTop = deltaV + (double)popup1.VerticalOffset;

double newLeft = deltaH + (double)popup1.HorizontalOffset;

// Set new position of object.

popup1.VerticalOffset = newTop;

popup1.HorizontalOffset = newLeft;

// Update position global variables.

_mouseVerticalPosition = e.GetPosition(null).Y;

_mouseHorizontalPosition = e.GetPosition(null).X;

var temBor = popupContent.Content as Border;

var lbl = temBor.Child as Label;

lbl.Content = "Selected to Drop (X=" + _mouseVerticalPosition + ",Y=" + _mouseHorizontalPosition + ")";

}

}

private void StartDragMouseLeftDown(MouseEventArgs e,object tag)

{

Thread.Sleep(350);

var myEffect = new DropShadowEffect

{

Color = Colors.Black,

BlurRadius = 5,

Direction = 280,

Opacity = 0.7,

ShadowDepth = 5,

};

var borde = new Border

{

BorderThickness = new Thickness(2),

BorderBrush = new SolidColorBrush(Colors.White),

Effect = myEffect,

Opacity = .7,

Tag = tag,

};

var lbl = new Label

{

Content = "Selected to Drop",

Foreground = new SolidColorBrush(Colors.Blue),

Background = new SolidColorBrush(Colors.DarkGray),

//BorderBrush = new SolidColorBrush(Colors.Orange),

BorderThickness = new Thickness(0)

};

borde.Child = lbl;

popupContent.Content = borde;

//popup1.CaptureMouse();

_captured = true;

_mouseVerticalPosition = e.GetPosition(null).Y;

_mouseHorizontalPosition = e.GetPosition(null).X;

popup1.HorizontalOffset = _mouseHorizontalPosition;

popup1.VerticalOffset = _mouseVerticalPosition;

_isDragStart = true;

}

private void GetDragDropElement()

{

if (_isDragStart)

{

MessageBox.Show("dropd on me");

_isDragStart = false;

}

}

//on .xaml file

/*

*/

#endregion

Get parent type Object ex. in treeview

void method

{

// calling the method

TreeViewItem trvItem = GetParentTreeViewItem((DependencyObject)sender);

}

// this will return the desire type exg. here it is returning TreeViewItem type..

private static TreeViewItem GetParentTreeViewItem(DependencyObject item)

{

if (item != null)

{

DependencyObject parent = VisualTreeHelper.GetParent(item);

TreeViewItem parentTreeViewItem = parent as TreeViewItem;

return (parentTreeViewItem != null) ? parentTreeViewItem : GetParentTreeViewItem(parent);

}

return null;

}

Get xml from web services and use in tree view of silver light

private void cmbTaxonomy_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

_objWebService.getTreeOfClassCompleted += new EventHandler(_objWebService_getTreeOfClassCompleted);

_objWebService.getTreeOfClassAsync(cmbTaxonomy.SelectedItem.ToString());

}

const string xmlNodeTextAttName = "Name";

const string xmlNodeTagAttId = "Id";

const string xmlNodeTagClass = "Class";

const string xmlNodeTagRoot = "Root";

void _objWebService_getTreeOfClassCompleted(object sender, getTreeOfClassCompletedEventArgs e)

{

XDocument xDocument = XDocument.Parse(e.Result);

trvHierarchy.Items.Clear();

if (xDocument.Root != null)

if(xDocument.Root.Elements().ToArray().Count()>0)

{

foreach (var VARIABLE in xDocument.Root.Elements().ToArray())

{

if (VARIABLE != null)

{

TreeViewItem parentNodeItem = new TreeViewItem

{

IsExpanded = true,

Header = CreateTreeViewItemHeader(VARIABLE.Attribute(xmlNodeTextAttName).Value, Convert.ToInt64(VARIABLE.Attribute(xmlNodeTagAttId).Value))

};

AddChildItemsInTree(VARIABLE, parentNodeItem);

trvHierarchy.Items.Add(parentNodeItem);

}

}

}

}

private void AddChildItemsInTree(XElement ParentVariable, TreeViewItem parentNodeItem)

{

if(ParentVariable.HasElements)

{

foreach(var variableChild in ParentVariable.Elements().ToArray())

{

if (ParentVariable != null)

{

TreeViewItem childNodeItem = new TreeViewItem

{

IsExpanded = true,

Header = CreateTreeViewItemHeader(variableChild.Attribute(xmlNodeTextAttName).Value, Convert.ToInt64(variableChild.Attribute(xmlNodeTagAttId).Value))

};

//childNodeItem.Header = variableChild.Attribute(xmlNodeTextAttName).Value;

AddChildItemsInTree(variableChild, childNodeItem);

parentNodeItem.Items.Add(childNodeItem);

}

}

}

}

Creat xml for web services and return it

public string getTreeOfClass(string taxonomyName)

{

//get ClassElementsName

var taxsonomyId = _exhibitDb.Taxonomies.SingleOrDefault(o => o.Taxonomy1 == taxonomyName);

var classeList = from c in _exhibitDb.Classes join tc in _exhibitDb.TaxonomyClasses on c.ID equals tc.ClassID where (tc.TaxonomyID.Equals(taxsonomyId.ID)) select c;

//XDocument document = new XDocument();

//document.Root

const string xmlNodeTextAttName = "Name";

const string xmlNodeTagAttId = "Id";

const string xmlNodeTagClass = "Class";

const string xmlNodeTagRoot = "Root";

XmlWriterSettings settings = new XmlWriterSettings

{

Indent = true,

OmitXmlDeclaration = true,

NewLineOnAttributes = false,

Encoding = Encoding.UTF8

};

StringBuilder sb = new StringBuilder();

XmlWriter writer = XmlWriter.Create(sb, settings);

//writing xml

if (writer != null)

{

writer.WriteStartDocument();

writer.WriteStartElement(xmlNodeTagRoot);

foreach (var v in classeList)

{

writer.WriteStartElement(xmlNodeTagClass);

writer.WriteAttributeString(xmlNodeTextAttName, v.Class1);

writer.WriteAttributeString(xmlNodeTagAttId, v.ID.ToString());

AddChildElement(writer, v.ID, xmlNodeTagAttId, xmlNodeTextAttName, xmlNodeTagClass);

writer.WriteEndElement();

}

writer.WriteEndElement();

writer.WriteEndDocument();

writer.Flush();

}

return sb.ToString();// xmlDocument;

}

crrating csv in c# and asp.net

public void getHBRemindercsvFile()
{
if(dsBdayReminder.Tables[0].Rows.Count<1)
{
LblError.Visible=true;
LblError.Text="You have no reminders !";
}
string attachment = "attachment; filename=BirthdayReminder.csv";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.AddHeader("content-disposition", attachment);
HttpContext.Current.Response.ContentType = "text/csv";
HttpContext.Current.Response.AddHeader("Pragma", "public");
WriteColumnName(" Name , Day , Month ");
foreach (DataRow drt in dsBdayReminder.Tables[0].Rows)
{
WriteHBReminder(drt);
}

HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
private void WriteHBReminder(DataRow drt)
{
StringBuilder stringBuilder = new StringBuilder();

AddComma(drt["reminder_name"].ToString(), stringBuilder);
AddComma(drt["reminder_day"].ToString(), stringBuilder);
AddComma(GetMonthName(Convert.ToInt32(drt["reminder_month"])), stringBuilder);

HttpContext.Current.Response.Write(stringBuilder.ToString());
HttpContext.Current.Response.Write(Environment.NewLine);
}

private void AddComma(string value, StringBuilder stringBuilder)
{
stringBuilder.Append(value.Replace(',', ' '));
stringBuilder.Append(", ");
}

private void WriteColumnName(string columnNames)
{
HttpContext.Current.Response.Write(columnNames);
HttpContext.Current.Response.Write(Environment.NewLine);
}

making thumbnil in asp.net

public class MakeThumbnail : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)

{

// get the file name -- fall800.jpg
string file = Request.QueryString["file"];

// create an image object, using the filename we just retrieved
System.Drawing.Image image = System.Drawing.Image.FromFile(Server.MapPath(file));

// create the actual thumbnail image
System.Drawing.Image thumbnailImage = image.GetThumbnailImage(160, 120, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);

// make a memory stream to work with the image bytes
MemoryStream imageStream = new MemoryStream();

// put the image into the memory stream
thumbnailImage.Save(imageStream, System.Drawing.Imaging.ImageFormat.Jpeg);//Imaging.Imageformat.Jpeg);

// make byte array the same size as the image
byte[] imageContent = new Byte[imageStream.Length];

// rewind the memory stream
imageStream.Position = 0;

// load the byte array with the image
imageStream.Read(imageContent, 0, (int)imageStream.Length);

// return byte array to caller with image type
Response.ContentType = "image/jpeg";
Response.BinaryWrite(imageContent);
}
public bool ThumbnailCallback()
{
return true;
}

HTML tag
img src='wallpaper/MakeThumbnail.aspx?file=<%# DataBinder.Eval(Container.DataItem,"image_path") %>'