C# PlaceHolder.FindControl方法代码示例

        public static void UploadRecipeImage(LyricRepository Lyric, PlaceHolder ph, string directory, int maxsize, bool IsEdit)
        {
            FileUpload ImageUpload = (FileUpload)(ph.FindControl("RecipeImageFileUpload"));

            if (ImageUpload.HasFile) //Check if there is a file
            {
                //Constant variables
                string Directory = directory;
                int maxFileSize = maxsize;

                int FileSize = ImageUpload.PostedFile.ContentLength; //Get th file lenght
                string contentType = ImageUpload.PostedFile.ContentType; // Get the file type
                string FileExist = Directory + ImageUpload.PostedFile.FileName; // Get the filename from the directory and compare
                string FileName = Path.GetFileNameWithoutExtension(ImageUpload.PostedFile.FileName); //Get the posted filename
                string FileExtention = Path.GetExtension(ImageUpload.PostedFile.FileName); //Get the posted file extension
                string FilePath;
                string FileNameWithExtension;

                //File type validation
                if (!contentType.Equals("image/gif") &&
                    !contentType.Equals("image/jpeg") &&
                    !contentType.Equals("image/jpg") &&
                    !contentType.Equals("image/png"))
                {
                    return;
                }
                // File size validation
                else if (FileSize > maxFileSize)
                {
                    return;
                }
                else
                {
                    //Check wether the image name already exist.
                    //If the image name already exist, append a random
                    //numeric and letter to ensure the image name is always unqiue.
                    if (File.Exists(HttpContext.Current.Server.MapPath(FileExist)))
                    {
                        //Create a random alpha numeric to make sure the updated image name is unique.
                        Random rand = new Random((int)DateTime.Now.Ticks);
                        int randnum = rand.Next(1, 10);
                        int CharCode = rand.Next(Convert.ToInt32('a'), Convert.ToInt32('z'));
                        char RandomChar = Convert.ToChar(CharCode);

                        //Get directory, the file name and the extension.
                        FilePath = string.Concat(Directory, FileName + randnum + RandomChar, "", FileExtention);

                        //Joined the filename and extension to insert into the database.
                        FileNameWithExtension = FileName + randnum + RandomChar + FileExtention;

                        //Initialize Add recipe object property to get the full image name
                        Lyric.LyricImage = FileNameWithExtension;

                        try
                        {
                            //Save the recipe image to the specified directory
                            //Make sure the "LyricImage" folder has write permission to upload image
                            ImageUpload.SaveAs(HttpContext.Current.Server.MapPath(FilePath));

                        }
                        catch
                        {

                        }
                    }
                    else
                    {
                        //Get directory, the file name and the extension.
                        FilePath = string.Concat(Directory, FileName, "", FileExtention);

                        //Joined the filename and extension to insert into the database.
                        FileNameWithExtension = FileName + FileExtention;

                        //Initialize Add recipe object property to get the full image name
                        Lyric.LyricImage = FileNameWithExtension;

                        try
                        {
                            //Save the recipe image to the specified directory
                            //Make sure the "LyricImage" folder has write permission to upload image
                            ImageUpload.SaveAs(HttpContext.Current.Server.MapPath(FilePath));

                        }
                        catch
                        {

                        }
                    }
                }
            }
            else
            {
                if (!IsEdit)
                {
                    //If there is no image to be uploaded, then assign an empty string to the property
                    Lyric.LyricImage = string.Empty;
                }
                else
                {
                    //This section is executed if the input file is empty.
//.........这里部分代码省略.........

        /// <summary>
        /// Return whether an item is new or popular and display its associated image or text in recipedetail page.
        /// </summary>
        public static void GetIdentifyItemNewPopular(DateTime strDate, PlaceHolder ph, int Popular)
        {
            //Find controls
            Label PopularLabel = (Label)(ph.FindControl("lblpopular"));
            Image thumbsupimg = (Image)(ph.FindControl("thumbsup"));
            Image Newimage = (Image)(ph.FindControl("newimg"));

            //Get thumbs up image - indicate that the item is hot or popular.
            ShowPopularImage(Popular, PopularLabel, thumbsupimg);

            //Get new image if item is less than or equal to 7 days old
            ShowNewImage(DateTime.Now.Subtract(strDate), Newimage);
        }

        public static void UploadUserImage(UserRepository User, PlaceHolder ph, string directory, int maxsize)
        {
            FileUpload ImageUpload = (FileUpload)(ph.FindControl("UserImageFileUpload"));

            if (ImageUpload.HasFile) //Check if there is a file
            {
                //Constant variables
                string Directory = directory;
                int maxFileSize = maxsize;

                int FileSize = ImageUpload.PostedFile.ContentLength; //Get th file lenght
                string contentType = ImageUpload.PostedFile.ContentType; // Get the file type
                string FileExist = Directory + ImageUpload.PostedFile.FileName; // Get the filename from the directory and compare
                string FileName = User.Username; //Use username as the image name. Username is unique so no problem with this.
                string FileExtention = Path.GetExtension(ImageUpload.PostedFile.FileName); //Get the posted file extension
                string FilePath;
                string FileNameWithExtension;

                //File type validation
                if (!contentType.Equals("image/gif") &&
                    !contentType.Equals("image/jpeg") &&
                    !contentType.Equals("image/jpg") &&
                    !contentType.Equals("image/png"))
                {
                    return;
                }
                // File size validation
                else if (FileSize > maxFileSize)
                {
                    return;
                }
                else
                {
                    //If the user updated the photo, just overwrite the old one.
                    //Get directory, the file name and the extension.
                    FilePath = string.Concat(Directory, FileName, "", FileExtention);

                    //Joined the filename and extension to insert into the database.
                    FileNameWithExtension = FileName + FileExtention;

                    //Initialize Add recipe object property to get the full image name
                    User.Photo = FileNameWithExtension;

                    try
                    {
                        //Save the recipe image to the specified directory
                        //Make sure the "LyricImage" folder has write permission to upload image
                        ImageUpload.SaveAs(HttpContext.Current.Server.MapPath(FilePath));

                    }
                    catch
                    {

                    }
                }
            }
            else
            {
                //If there is no image to be uploaded, then assign an empty string to the property
                User.Photo = string.Empty;
            }
        }

        /// <summary>
        /// Registers startup events
        /// </summary>
        /// <param name="EventLocation"> Event locations</param>
        /// <param name="PortalID">portalID</param>
        /// <param name="phdContainer">Placeholder name</param>  
        /// <param name="IsAdmin">Set true for admin part</param>
        public void IncludeStartupEvents(SystemEventLocation EventLocation, int PortalID, PlaceHolder phdContainer, bool IsAdmin)
        {
            SystemStartupController obj = new SystemStartupController();
            ArrayList arrColl = new ArrayList();
            switch (EventLocation)
            {
                case SystemEventLocation.Top:
                    arrColl = obj.GetStartUpControls("Top", PortalID, IsAdmin);
                    for (int i = 0; i < arrColl.Count; i++)
                    {
                        try
                        {
                            UserControl ctl = this.Page.LoadControl("~/" + arrColl[i].ToString()) as SageFrameStartUpControl;
                            if (ctl != null)
                            {
                                this.Page.Controls.AddAt(0, ctl);
                            }
                        }
                        catch
                        {
                        }

                    }
                    break;
                case SystemEventLocation.Middle:
                    arrColl = obj.GetStartUpControls("Middle", PortalID, IsAdmin);
                    UserControl uc = phdContainer.FindControl("lytA") as UserControl;
                    for (int i = 0; i < arrColl.Count; i++)
                    {
                        try
                        {
                            UserControl ctl = this.Page.LoadControl("~/" + arrColl[i].ToString()) as SageFrameStartUpControl;
                            PlaceHolder phdPlaceHolderMiddle = uc.FindControl("pch_middlemaincurrent") as PlaceHolder;
                            if (phdPlaceHolderMiddle != null && ctl != null)
                            {
                                phdPlaceHolderMiddle.Controls.Add(ctl);
                            }
                        }
                        catch
                        {
                        }
                    }
                    break;
                case SystemEventLocation.Bottom:
                    arrColl = obj.GetStartUpControls("Bottom", PortalID, IsAdmin);
                    for (int i = 0; i < arrColl.Count; i++)
                    {
                        try
                        {
                            UserControl ctl = this.Page.LoadControl("~/" + arrColl[i].ToString()) as SageFrameStartUpControl;
                            if (ctl != null)
                            {
                                this.Page.Controls.AddAt(this.Page.Controls.Count, ctl);
                            }
                        }
                        catch
                        {
                        }
                    }
                    break;
            }
        }

 protected void displayLogin(PlaceHolder placeholder)
 {
     LoginHelper.drawByAuthenticated(placeholder);
     Button bt = ((Button)placeholder.FindControl("loginButton"));
     bt.Click += new System.EventHandler(loginDo);
 }

//.........这里部分代码省略.........

            // 检索按钮
            this.Controls.Add(new LiteralControl(
                "<tr class='cmdline'><td></td><td colspan='" + Convert.ToString(nCols - 1) + "'>"
            ));

            // Search Button
            Button button = new Button();
            button.ID = "search_button";
            button.Text = this.GetString("检索");
            button.CssClass = "search";
            button.Click += new EventHandler(this.SearchButton_Click);
            this.Controls.Add(button);

            // 增加前端事件代码,以便响应回车按钮
            for (int i = 0; i < textboxs.Count; i++)
            {
                TextBox box = textboxs[i];
                box.Attributes.Add("onkeydown", "if(event.which || event.keyCode){if ((event.which == 13) || (event.keyCode == 13)) {document.getElementById('" + button.ClientID + "').click();return cancelClick();}} else {return true}; "); // 原来为 button.UniqueID 也可用
            }

            this.Controls.Add(new LiteralControl(
                "</td></tr>"
            ));

            // 调试信息行
            PlaceHolder resultline = new PlaceHolder();
            resultline.ID = "resultline";
            this.Controls.Add(resultline);

            CreateResultLine(resultline);

            {
                PlaceHolder line = (PlaceHolder)FindControl("resultline");
                TableCell cell = (TableCell)line.FindControl("resultinfo");
                button.Attributes.Add("onclick", "document.getElementById('" + cell.ClientID + "').innerText = '"
                    + this.GetString("正在检索...")
                    + "';return true;");
            }

            // 面板风格选择列表
            literal = new LiteralControl("<tr class='panelstyle'><td colspan='" + Convert.ToString(nCols) + "'>"
                + this.GetString("检索面板风格")
                + " ");
            this.Controls.Add(literal);
            if ((this.SearchPanelStyle & SearchPanelStyle.PanelStyleSwitch) == SearchPanelStyle.PanelStyleSwitch)
                literal.Visible = true;
            else
                literal.Visible = false;

            DropDownList panelstyle = new DropDownList();
            panelstyle.ID = "panelstyle";
            panelstyle.CssClass = "panelstyle";
            // panelstyle.Width = new Unit("100%");
            panelstyle.AutoPostBack = true;
            panelstyle.TextChanged -= new EventHandler(panelstyle_TextChanged);
            panelstyle.TextChanged += new EventHandler(panelstyle_TextChanged);
            this.Controls.Add(panelstyle);
            if ((this.SearchPanelStyle & SearchPanelStyle.PanelStyleSwitch) == SearchPanelStyle.PanelStyleSwitch)
                panelstyle.Visible = true;
            else
                panelstyle.Visible = false;

            FillPanelStyleList(panelstyle);

            literal = new LiteralControl("</td></tr>");

        /// <summary>
        /// 設置分頁連結
        /// </summary>
        /// <param name="currentPage"></param>
        /// <param name="selectPage"></param>
        /// <param name="totalPage"></param>
        public static void SetHyperLink(PlaceHolder placeHolder, LinkButton pagingButton)
        {
            // 取得目前選擇的頁次與值
            int nowPageValue = (pagingButton.CommandName == "*" ) ? int.Parse(pagingButton.ToolTip) : int.Parse(pagingButton.Text);
            int nowPageIndex = int.Parse(pagingButton.ToolTip);

            // 取得之前選擇的頁次與值
            int lastPageValue = 0;
            int lastPageIndex = 0;

            for (int i = 1; i <= ((pds.PageCount > 10) ? 11 : pds.PageCount); i++)
            {
                LinkButton lb = (LinkButton)placeHolder.FindControl("_LinkButton" + i.ToString());
                if (lb != null)
                {
                    // 初始化
                    lb.Visible = true;
                    if (lb.Style.Count > 0 && lb.Style["text-decoration"].ToString() == "none")
                    {
                        lastPageValue = (pagingButton.CommandName == "*" ) ? int.Parse(pagingButton.ToolTip) : int.Parse(lb.Text);
                        lastPageIndex = int.Parse(lb.ToolTip);
                    }
                }
            }

            // 新增位移的差距值
            int offset = (nowPageValue - lastPageValue);

            // 新的起始值是否小於0
            bool isLow = false;

            if (pagingButton.CommandName == "*" && pagingButton.ID == "_LinkButtonFirst")
            {
                for (int i = 1; i <= ((TotalPage >= 11) ? 11 : TotalPage); i++)
                {
                    LinkButton lb = (LinkButton)placeHolder.FindControl("_LinkButton" + i.ToString());
                    lb.Text = i.ToString();
                    lb.CommandArgument = lb.Text;

                    lb.Style.Add("text-decoration", (i==1) ? "none" : "underline;");
                    if (int.Parse(lb.Text) > TotalPage) lb.Visible = false;
                }
            }
            else if (pagingButton.CommandName == "*" && pagingButton.ID == "_LinkButtonLast")
            {
                for (int i = 1; i <= ((TotalPage >= 11) ? 11 : TotalPage); i++)
                {
                    LinkButton lb = (LinkButton)placeHolder.FindControl("_LinkButton" + i.ToString());
                    lb.Text = (TotalPage - (( TotalPage < 6 ) ? TotalPage : 6 ) + i).ToString();
                    lb.CommandArgument = lb.Text;

                    lb.Style.Add("text-decoration", (int.Parse(lb.Text) == TotalPage) ? "none" : "underline;");
                    if (int.Parse(lb.Text) > TotalPage) lb.Visible = false;
                }
            }
            else
            {

                // 如果是增值
                if (offset > 0 && pagingButton.CommandName != "*")
                {
                    if (lastPageValue == 1)
                    {
                        // 首次切換頁次
                        for (int i = 1; i <= ((TotalPage >= 11) ? 11 : TotalPage); i++)
                        {
                            LinkButton lb = (LinkButton)placeHolder.FindControl("_LinkButton" + i.ToString());

                            if (lastPageIndex < 6 && nowPageValue > 6)
                                lb.Text = (int.Parse(lb.Text) + (nowPageValue - 6)).ToString();
                            else
                                lb.Text = i.ToString();

                            lb.CommandArgument = lb.Text;
                            lb.Style.Add("text-decoration", (int.Parse(lb.Text) == nowPageValue) ? "none" : "underline;");

                            if (int.Parse(lb.Text) > TotalPage) lb.Visible = false;
                        }
                    }
                    else
                    {
                        // 非首次切換頁次
                        for (int i = 1; i <= ((TotalPage >= 11) ? 11 : TotalPage); i++)
                        {
                            LinkButton lb = (LinkButton)placeHolder.FindControl("_LinkButton" + i.ToString());

                            if (lastPageIndex == 6)
                                lb.Text = (int.Parse(lb.Text) + offset).ToString();
                            else if (lastPageIndex < 6 && nowPageValue > 6)
                                lb.Text = (int.Parse(lb.Text) + nowPageValue - 6).ToString();
                            else if (lastPageIndex < 6 && nowPageValue <= 6)
                                lb.Text = i.ToString();
                            else
                                lb.Text = (int.Parse(lb.Text) + offset - lastPageIndex).ToString();
//.........这里部分代码省略.........

 //create the opposite of createHtmlInputControl to handle control types when read
 public bool fillObjectFromPlaceHolder(PlaceHolder placeholder)
 {
     Control currentControl;
     foreach(DataRow row in _dbSchemas[this._dbTable].Rows) {
         currentControl = placeholder.FindControl((row["ColumnName"]).ToString());
         if (currentControl is CheckBox) {
             this._dbData[row["ColumnName"].ToString()] = ((CheckBox)currentControl).Checked;
         } else if (currentControl is TextBox) {
             this._dbData[row["ColumnName"].ToString()] = ((TextBox)currentControl).Text;
         } else if (currentControl is DropDownList) {
             //throw new Exception(((DropDownList)currentControl).SelectedValue);
             this._dbData[row["ColumnName"].ToString()] = ((DropDownList)currentControl).SelectedValue;
         }
     }
     return true;
 }