303 usuarios y 202 recortes de código
using System; using System.Threading; namespace CSharpSchool { class Test { static void Main() { Thread firstThread = new Thread(new ThreadStart(fun1)); Thread fsecondThread = new Thread(new ThreadStart(fun2)); firstThread.Start(); secondThread.Start(); console.WriteLine("End of Main()"); } public static void Fun1() { for (int i=1; i<=5; i++) { Console.WriteLine("Fun1() writes: {0}", i); } } public static void Fun2() { for (int i=1; i<=6; i++) { Console.WriteLine("Fun2() writes: {0}", i); } } } }
valor_logico = ((int)clave.GetValue (nombreCadena)) == 1;Para leer los datos del registro. Suponiendo que clave es un RegistryKey ya abierto. Y:
clave.SetValue (nombreCadena, valor_logico ? 1 : 0, RegistryValueKind.DWord);para escribirlo.
public class GestionVentana { Progreso progreso; InvConf.Configuracion conf; public GestionVentana (ref InvConf.Configuracion conf, ref Progreso progreso) { this.conf = conf; this.progreso = progreso; } public void bw_RunWorkerCompleted (object sender, System.ComponentModel.RunWorkerCompletedEventArgs e) { this.progreso.Hide (); } public void bw_DoWork (object sender, System.ComponentModel.DoWorkEventArgs e) { // Esta es la función que tarda varios minutos this.conf.procesarEquipo (); } }Y después en el método principal debemos insertar algo como esto:
System.ComponentModel.BackgroundWorker bw = new System.ComponentModel.BackgroundWorker (); GestionVentana gv = new GestionVentana (ref conf, ref progreso); bw.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler (gv.bw_RunWorkerCompleted); bw.DoWork += new System.ComponentModel.DoWorkEventHandler (gv.bw_DoWork); bw.RunWorkerAsync (); while (bw.IsBusy) { // O cualquier otra actualización en la interfaz que queramos realizar. Application.DoEvents (); }
public static void ShowMessage(System.Web.UI.Page p, string message) { message = message.Replace("'", @"\'"); message = message.Replace("\"", @"\" + '"'); //MessageBox Script String scriptString = "<script language=JavaScript>"; scriptString += "alert('" + message + "');"; scriptString += "</script>"; p.RegisterStartupScript("ShowMessage", scriptString); }
/// <summary> /// Obtiene el valor de un atributo que se encuentra en el Request de la pagina. /// Si no se encuentra el atributo regresa una cadena vacia. /// </summary> /// <param name="Request">Objeto Request de la pagina.</param> /// <param name="attributeName">Nombre del atributo del cual se desea obtener su valor.</param> /// <returns>Regresa el valor del atributo, en caso de no existir retorna una cadena vacia.</returns> public static string getAttribute(System.Web.HttpRequest Request, string attributeName) { string attributeValue=""; try { attributeValue = Request.QueryString[attributeName]; if(attributeValue==null || attributeValue.Trim().Equals("")==true) attributeValue = ""; } catch{} return attributeValue; }
public static void DT2xls(System.Web.HttpResponse Response, DataTable dt) { // exportar a xls Response.Clear(); Response.Buffer= true; Response.AddHeader("Content-Disposition", "attachment; filename=Export.xls"); Response.ContentType = "application/vnd.ms-excel"; System.IO.StringWriter oStringWriter = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter); System.Web.UI.WebControls.DataGrid dg = new System.Web.UI.WebControls.DataGrid(); dg.DataSource = dt; dg.DataBind(); dg.RenderControl(oHtmlTextWriter); Response.Write(oStringWriter); Response.End(); }
static System.Drawing.Image FixedSize(System.Drawing.Image imgPhoto, int Width, int Height) { int sourceWidth = imgPhoto.Width; int sourceHeight = imgPhoto.Height; int sourceX = 0; int sourceY = 0; int destX = 0; int destY = 0; float nPercent = 0; float nPercentW = 0; float nPercentH = 0; nPercentW = ((float)Width/(float)sourceWidth); nPercentH = ((float)Height/(float)sourceHeight); if(nPercentH < nPercentW) { nPercent = nPercentH; destX = System.Convert.ToInt16((Width - (sourceWidth * nPercent))/2); } else { nPercent = nPercentW; destY = System.Convert.ToInt16((Height - (sourceHeight * nPercent))/2); } int destWidth = (int)(sourceWidth * nPercent); int destHeight = (int)(sourceHeight * nPercent); Bitmap bmPhoto = new Bitmap(Width, Height, PixelFormat.Format24bppRgb); bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); Graphics grPhoto = Graphics.FromImage(bmPhoto); grPhoto.Clear(Color.Transparent); grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic; grPhoto.DrawImage(imgPhoto, new Rectangle(destX,destY,destWidth,destHeight), new Rectangle(sourceX,sourceY,sourceWidth,sourceHeight), GraphicsUnit.Pixel); grPhoto.Dispose(); return bmPhoto; }
private System.Drawing.Image PutWaterMark(System.Drawing.Image imgPhoto, System.Drawing.Image imgWatermark, string Copyright) { int phWidth = imgPhoto.Width; int phHeight = imgPhoto.Height; //create a Bitmap the Size of the original photograph Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb); bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); //load the Bitmap into a Graphics object Graphics grPhoto = Graphics.FromImage(bmPhoto); //create a image object containing the watermark int wmWidth = imgWatermark.Width; int wmHeight = imgWatermark.Height; //------------------------------------------------------------ //Step #1 - Insert Copyright message //------------------------------------------------------------ //Set the rendering quality for this Graphics object grPhoto.SmoothingMode = SmoothingMode.AntiAlias; //Draws the photo Image object at original size to the graphics object. grPhoto.DrawImage( imgPhoto, // Photo Image object new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure 0, // x-coordinate of the portion of the source image to draw. 0, // y-coordinate of the portion of the source image to draw. phWidth, // Width of the portion of the source image to draw. phHeight, // Height of the portion of the source image to draw. GraphicsUnit.Pixel); // Units of measure //------------------------------------------------------- //to maximize the size of the Copyright message we will //test multiple Font sizes to determine the largest posible //font we can use for the width of the Photograph //define an array of point sizes you would like to consider as possiblities //------------------------------------------------------- int[] sizes = new int[]{16,14,12,10,8,6,4}; Font crFont = null; SizeF crSize = new SizeF(); //Loop through the defined sizes checking the length of the Copyright string //If its length in pixles is less then the image width choose this Font size. for (int i=0 ;i<7; i++) { //set a Font object to Arial (i)pt, Bold crFont = new Font("arial", sizes[i], FontStyle.Bold); //Measure the Copyright string in this Font crSize = grPhoto.MeasureString(Copyright, crFont); if((ushort)crSize.Width < (ushort)phWidth) break; } //Since all photographs will have varying heights, determine a //position 5% from the bottom of the image int yPixlesFromBottom = (int)(phHeight *.05); //Now that we have a point size use the Copyrights string height //to determine a y-coordinate to draw the string of the photograph float yPosFromBottom = ((phHeight - yPixlesFromBottom)-(crSize.Height/2)); //Determine its x-coordinate by calculating the center of the width of the image float xCenterOfImg = (phWidth/2); //Define the text layout by setting the text alignment to centered StringFormat StrFormat = new StringFormat(); StrFormat.Alignment = StringAlignment.Center; //define a Brush which is semi trasparent black (Alpha set to 153) SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0)); //Draw the Copyright string grPhoto.DrawString(Copyright, //string of text crFont, //font semiTransBrush2, //Brush new PointF(xCenterOfImg+1,yPosFromBottom+1), //Position StrFormat); //define a Brush which is semi trasparent white (Alpha set to 153) SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255)); //Draw the Copyright string a second time to create a shadow effect //Make sure to move this text 1 pixel to the right and down 1 pixel grPhoto.DrawString(Copyright, //string of text crFont, //font semiTransBrush, //Brush new PointF(xCenterOfImg,yPosFromBottom), //Position StrFormat); //Text alignment //------------------------------------------------------------ //Step #2 - Insert Watermark image //------------------------------------------------------------ //Create a Bitmap based on the previously modified photograph Bitmap Bitmap bmWatermark = new Bitmap(bmPhoto); bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); //Load this Bitmap into a new Graphic Object Graphics grWatermark = Graphics.FromImage(bmWatermark); //To achieve a transulcent watermark we will apply (2) color //manipulations by defineing a ImageAttributes object and //seting (2) of its properties. ImageAttributes imageAttributes = new ImageAttributes(); //The first step in manipulating the watermark image is to replace //the background color with one that is trasparent (Alpha=0, R=0, G=0, B=0) //to do this we will use a Colormap and use this to define a RemapTable ColorMap colorMap = new ColorMap(); //My watermark was defined with a background of 100% Green this will //be the color we search for and replace with transparency colorMap.OldColor = Color.FromArgb(255, 0, 255, 0); colorMap.NewColor = Color.FromArgb(0, 0, 0, 0); ColorMap[] remapTable = {colorMap}; imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap); //The second color manipulation is used to change the opacity of the //watermark. This is done by applying a 5x5 matrix that contains the //coordinates for the RGBA space. By setting the 3rd row and 3rd column //to 0.3f we achive a level of opacity float[][] colorMatrixElements = { new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}}; ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); //For this example we will place the watermark in the upper right //hand corner of the photograph. offset down 10 pixels and to the //left 10 pixles int xPosOfWm = ((phWidth - wmWidth)-10); int yPosOfWm = 10; grWatermark.DrawImage(imgWatermark, new Rectangle(xPosOfWm,yPosOfWm,wmWidth,wmHeight), //Set the detination Position 0, // x-coordinate of the portion of the source image to draw. 0, // y-coordinate of the portion of the source image to draw. wmWidth, // Watermark Width wmHeight, // Watermark Height GraphicsUnit.Pixel, // Unit of measurment imageAttributes); //ImageAttributes Object //Replace the original photgraphs bitmap with the new Bitmap imgPhoto = bmWatermark; grPhoto.Dispose(); grWatermark.Dispose(); //save new image to file system. return imgPhoto; }
public static System.Drawing.Image Byte2Image(byte[] array) { System.IO.MemoryStream s = new MemoryStream(); s.Write(array,0,array.Length); System.Drawing.Image foto = System.Drawing.Image.FromStream(s); s.Close(); return foto; }
public static byte[] Image2Byte(System.Drawing.Image image) { // make a memory stream to work with the image bytes MemoryStream imageStream = new MemoryStream(); // put the image into the memory stream image.Save(imageStream, System.Drawing.Imaging.ImageFormat.Jpeg); return imageStream.GetBuffer(); }
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