C# TextBox.Clear方法代碼示例

        public List<Container> CalculateLoadScheme(List<Container> containers,
            ObservableCollection<Vehicle> selectedVehicles, TextBox textBox, int maxTonnage)
        {
            // BtnCalculate_click
            int tempMaxTonnage;
            var widthBetweenVehicles = 1000;
            var tempPoint = new Point3D(0, 0, 0);
            textBox.Clear();
            textBox.AppendText("Протокол расчета схемы загрузки:\n");
            var tempList = RotateContainers(containers);

            foreach (var vehicle in selectedVehicles)
            {
                LocateContainers locateContainers = new LocateContainers(vehicle);

                tempMaxTonnage = maxTonnage == 0 ? vehicle.Tonnage : maxTonnage;
                tempList = locateContainers.DownloadContainers(tempList, tempMaxTonnage);
                SetFirstPoint(tempPoint,vehicle);
                tempPoint.Y = tempPoint.Y + widthBetweenVehicles + vehicle.Width;// TODO tempPoint.Z = tempPoint.Z + widthBetweenVehicles + vehicle.Width;
                PutCargoInfoInTextBox(vehicle, textBox);
                CheckOverweight(vehicle, textBox, tempMaxTonnage);
                VehicleAxisMass vehicleAxisMass = new VehicleAxisMass(vehicle, vehicle.Mass);
                PutVehAxisMassInfoInTextBox(vehicleAxisMass.AxisMassCalculate(), textBox);
            }
            PutWasteContainersInfoInTextBox(tempList, textBox);
            CheckErrors(tempList, textBox, selectedVehicles, containers);

            return tempList;
        }

 public static void Limpiar(TextBox t1, TextBox t2 = null, TextBox t3 = null)
 {
     t1.Clear();
     if (t2 != null)
         t2.Clear();
     if (t3 != null)
         t3.Clear();
     t1.Focus();
 }

 //DEC TO BIN
 private void bin(int dec, TextBox text)
 {
     text.Clear();
     for(int i=15;i>=0;i--)
     {
         if (i == 7) text.Text += " ";
         text.Text += Convert.ToString((dec >> i) % 2);
     }
 }

        void checkNumBox(TextBox box)
        {
            int convertedText = 0;
            if (!int.TryParse(box.Text, out convertedText))
            {
                box.Clear();
            }

        }

        public void ButtonCode(int GBATotal, int NDSTotal, bool GBA, bool NDS, TextBox ButtonInput, TextBox ButtonOutput, TextBox NDSTst, TextBox GBATst)
        {
            //NOT_GBA and NOT_NDS will hold the 
            //16-bit values of NOT_GBATotal and NOT_NDSTotal
            string D2 = "D2000000 00000000";
            ushort NOT_GBA = (ushort)~GBATotal;
            ushort NOT_NDS = (ushort)~NDSTotal; 

            if (GBATotal != 0)
                GBA = true;
            if (NDSTotal != 0)
                NDS = true;

            if (GBA == true)
            {
                ButtonOutput.Text = "94000130 " + NOT_GBA.ToString("X") + "0000\n" + ButtonInput.Text + '\n' + D2;
                GBATst.Text = "GBA tst Value: 0x" + GBATotal.ToString("X4");
            }
            else GBATst.Clear();

            if (NDS == true)
            {
                ButtonOutput.Text = "927FFFA8 " + NOT_NDS.ToString("X") + "0000\n" + ButtonInput.Text + '\n' + D2;
                NDSTst.Text = "NDS tst Value: 0x" + NDSTotal.ToString("X4");
            }
            else NDSTst.Clear();

            if (GBA == true && NDS == true)
            {
                ButtonOutput.Text = "927FFFA8 " + NOT_NDS.ToString("X") + "0000\n94000130 " +
                             NOT_GBA.ToString("X") + "0000\n" + ButtonInput.Text + '\n' + D2;
            }
            else if (GBA == false && NDS == false)
            {
                ButtonOutput.Clear();
                GBATst.Clear();
                NDSTst.Clear();
            }
        }

        void checkTextBox(TextBox box)
        {
            if (box.Text.Intersect(forbiddenChars).Any())
            {
                box.Clear();
            }

            if (box.Text.Intersect(smallChars).Any())
            {
                box.Text = box.Text.ToUpper();
                box.SelectionStart = box.Text.Length;
                box.SelectionLength = 0;
            }
        }

        //checks whether textbox content > 255 when 3 characters have been entered.
        //clears if > 255, switches to next textbox otherwise
        private void handleTextChange(TextBox currentBox, TextBox rightNeighborBox)
        {
            if (currentBox.Text.Length == 3)
            {
                try
                {
                    Convert.ToByte(currentBox.Text);

                }
                catch (Exception exception) when (exception is FormatException || exception is OverflowException)
                {
                    currentBox.Clear();
                    currentBox.Focus();
                    SystemSounds.Beep.Play();
                    MessageBox.Show(errorMessage, "Error", MessageBoxButton.OK, MessageBoxImage.Warning);
                    return;
                }
                if (currentBox.CaretIndex != 2 && currentBox != fourthBox)
                {
                    rightNeighborBox.CaretIndex = rightNeighborBox.Text.Length;
                    rightNeighborBox.SelectAll();
                    rightNeighborBox.Focus();
                }
            }
        }

        public ApplicationCanvas()
        {
            r.Fill = Brushes.LightGray;
            r.AttachTo(this);
            r.MoveTo(4, 4);
            this.SizeChanged += (s, e) => r.SizeTo(this.Width - 8.0, this.Height - 8.0);

            var label1 = new TextBlock
            {
                Text = "Enter a list of names separated by commas",
            }.AttachTo(this).MoveTo(8, 8);

            var users = new TextBox
            {
                AcceptsReturn = true,
                TextWrapping = System.Windows.TextWrapping.Wrap,
                Width = 500,
                Height = 50,
                Text = "_martin, mike, mac, ken, neo, zen, jay, morpheous, trinity, Agent Smith, _psycho",
            }.AttachTo(this).MoveTo(8, 8 + 32);



            var label2 = new TextBlock
            {
                Text = "Enter a partial name to be found from the list above.",
            }.AttachTo(this).MoveTo(8, 8 + 32 + 50 + 8);

            var filter = new TextBox
            {
                Width = 500,
                Text = "psy",
            }.AttachTo(this).MoveTo(8, 8 + 32 + 50 + 8 + 16);

            var label3 = new TextBlock
            {
                Text = "Enter a partial name to make the entry special",
            }.AttachTo(this).MoveTo(8, 8 + 32 + 50 + 8 + 58);

            var filter2 = new TextBox
            {
                Width = 500,
                Text = "a",
            }.AttachTo(this).MoveTo(8, 8 + 32 + 50 + 8 + 16 + 58);



            var label4 = new TextBlock
            {
                Text = "Results",
            }.AttachTo(this).MoveTo(8, 8 + 32 + 50 + 8 + 58 + 58);

            var result = new TextBox
            {
                AcceptsReturn = true,
                TextWrapping = System.Windows.TextWrapping.Wrap,

                Background = Brushes.Transparent,
                BorderThickness = new Thickness(0),

                Width = 500,
                Height = 50,
                Text = "?",
                TextAlignment = System.Windows.TextAlignment.Right,
                IsReadOnly = true,
            }.AttachTo(this).MoveTo(8, 8 + 32 + 50 + 8 + 16 + 58 + 58);

            Action Update =
                delegate
                {
                    var user_filter = filter.Text.Trim().ToLower();
                    var user_filter2 = filter2.Text.Trim().ToLower();

                    result.Clear();

                    var __users = users.Text.Split(',');


                    var query = from i in __users
                                where i.ToLower().Contains(user_filter)
                                let name = i.Trim()
                                let isspecial = i.ToLower().Contains(user_filter2)
                                orderby isspecial ascending, name.Length descending, name
                                select new { isspecial, length = name.Length, name };

                    foreach (var v in query)
                    {
                        var m = "match: " + v;

                        if (v.isspecial)
                            m = m.ToUpper();

                        result.AppendText(m + Environment.NewLine);
                    }
                };

            Update();

            users.TextChanged += delegate { Update(); };
            filter.TextChanged += delegate { Update(); };
//.........這裏部分代碼省略.........

        bool checkLanguage(TextBox box)
        {
            bool result = true;

            if (language == Alphabet.English)
            {
                if (box.Text.Intersect(Cezar.ALPHABET_RU).Any())
                {
                    box.Clear();
                    result = false;
                }
            }

            if (language == Alphabet.Russian)
            {
                if (box.Text.Intersect(Cezar.ALPHABET_EN).Any())
                {
                    box.Clear();
                    result = false;
                }
            }

            return result;
        }

 void printToBox(TextBox box, int[] array)
 {
     box.Clear();
     foreach (byte num in array)
     {
         //if (num == 0) continue;
         box.Text += num + " ";
     }
 }

 //aux function for a damage timer, its sending workers to rest
 private void auxRestAfterDamage(TextBox text)
 {
     //during breakdown
     int freePositions = Convert.ToInt32(tbNumber.Text) + 1;
     load.amountWorkers = load.amountWorkers - 1;
     text.IsEnabled = false;
     auxFill();
     tbNumber.Text = Convert.ToString(freePositions);
     text.Clear();
 }

        private void ConstructObjects()
        {
            var lbStation = new Label();
            lbStation.Content = "選擇站別 ( * ) :";

            var bStation = new Border();
            bStation.Width = 300;
            bStation.Height = 40;
            bStation.Background = Brushes.White;
            bStation.BorderBrush = Brushes.White;
            bStation.BorderThickness = new Thickness(5);

            var cbstation = new ComboBox();
            cbstation.Items.Add(StationName.gStationA);
            cbstation.Items.Add(StationName.gStationB);
            cbstation.Items.Add(StationName.gStationC);
            //cbstation.Items.Add(StationName.gStationD);
            cbstation.Items.Add(StationName.gStationE);
            cbstation.Items.Add(StationName.gStationF);
            cbstation.Items.Add(StationName.gStationG);

            bStation.Child = cbstation;
            cbstation.SelectionChanged += cbstation_SelectionChanged;

            var spName = new StackPanel();
            spName.HorizontalAlignment = HorizontalAlignment.Left;
            var lbUsername = new Label();
            lbUsername.Content = "操作人員  ( * ) :";
            var txtboxUsername = new TextBox();
            txtboxUsername.Height = 30;
            txtboxUsername.Width = 150;
            txtboxUsername.KeyUp += txtboxUsername_KeyUp;
            spName.Children.Add(lbUsername);
            spName.Children.Add(txtboxUsername);

            var lbLogin = new Label();
            lbLogin.Content = SigknowDBServer.gServer;

            var buttonLogin = new Button();
            buttonLogin.Content = "登入";
            buttonLogin.Click += buttonLogin_Click;
            buttonLogin.Height = 30;
            buttonLogin.Width = 50;

            var spServer = new StackPanel();
            spServer.HorizontalAlignment = HorizontalAlignment.Left;
            var lbServer = new Label();
            lbServer.Content = "資料庫網址  ( * ) :";
            var txtboxServer = new TextBox();
            txtboxServer.Height = 30;
            txtboxServer.Width = 150;
            txtboxServer.KeyUp += txtboxServer_KeyUp;
            var buttonServer = new Button();
            buttonServer.Content = "設定";
            buttonServer.Click += buttonServer_Click;
            buttonServer.Height = 30;
            buttonServer.Width = 50;
            Utils.changeTextboxLang2Eng(txtboxServer);
            var lbReport = new Label();
            lbReport.Content = "";
            spServer.Children.Add(lbServer);
            spServer.Children.Add(txtboxServer);

            var buttonReport = new Button();
            buttonReport.Content = "匯出資料";
            buttonReport.Click += buttonReport_Click;
            buttonReport.Height = 30;
            buttonReport.Width = 100;

            StackPanel spMainBody = new StackPanel();
            spMainBody.HorizontalAlignment = HorizontalAlignment.Left;

            spMainBody.Children.Add(spServer);
            spMainBody.Children.Add(buttonServer);

            spMainBody.Children.Add(lbStation);
            spMainBody.Children.Add(bStation);
            spMainBody.Children.Add(spName);
            spMainBody.Children.Add(lbLogin);
            spMainBody.Children.Add(buttonLogin);

            spMainBody.Children.Add(lbReport);
            spMainBody.Children.Add(buttonReport);

            txtboxServer.Clear();
            txtboxServer.Focus();

            Content = spMainBody;
        }

 private decimal Parse(TextBox txt)
 {
     decimal var;
     try
     {
         if (!String.IsNullOrWhiteSpace(txt.Text))
         {
             // Try to parse param if it's not null
             var = decimal.Parse(txt.Text);
         }
         else
         {
             var = 0m;
         }
     }
     catch
     {
         // Clear and focus on error location. Prompt user as to where the error occurred using the ToolTip
         txt.Clear();
         txt.Focus();
         throw new Exception("Error! Value of " + txt.ToolTip.ToString() + " required as a decimal");
     }
     return var;
 }

 public static void Clean(TextBox textbox)
 {
     textbox.Clear();
 }

 //function sending workers to rest
 private void rest(TextBox text)
 {
     int freePositions = Convert.ToInt32(tbNumber.Text) + 1;
     if (text.IsEnabled == true)
     {
         load.amountWorkers = load.amountWorkers - 1;
         text.IsEnabled = false;
         auxFill();
         tbNumber.Text = Convert.ToString(freePositions);
         text.Clear();
     }
     else MessageBox.Show("This position is not filled!");
 }