如何在C＃中創建textBox后使用信息

Question

我創建了手動添加textBox和Button的函數。

這是我的實際腳本：

    private void OpenFileDialogButton_Click(object sender, EventArgs e)
    {
        OpenFileDialog openFileDialog1 = new OpenFileDialog();

        if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            string souborFilename = openFileDialog1.FileName;
            filePathText.Text = souborFilename;
        }
    }

    private void nextDialog_Click(object sender, EventArgs e)
    {
        if (calculate <= 7)
        {
            TextBox text = new TextBox();
            text.Location = new Point(filePathText.Location.X, filePathText.Location.Y + y);
            text.Size = new Size(194, 20);
            text.ReadOnly = true;
            text.Name = "filePathText" + "{calculate}";
            //MessageBox.Show(text.Name);
            this.Controls.Add(text);

            Button button = new Button();
            button.Location = new Point(OpenFileDialogButton.Location.X, OpenFileDialogButton.Location.Y + y);
            button.Size = new Size(33, 24);
            button.Text = "...";
            button.Click += new EventHandler(OpenFileDialogButton_Click);
            this.Controls.Add(button);

            this.nextDialog.Location = new Point(22, 49 + y);
        }
        else
        {
            this.nextDialog.Controls.Remove(nextDialog);
            this.nextDialog.Dispose();
            MessageBox.Show("Maximální možnost počtů přidaných souborů byla dosažena!");
        }

        y = y + 28;
        calculate++;
    }

當用戶單擊nextDialog按鈕以使其創建正確的下一個按鈕和textboxt但所有按鈕具有相同的功能。 每個按鈕都有自己的textBox。

問題是在使用openFileDialog之后，每個按鈕仍然會改變相同的textBox。 我需要每個按鈕只更改自己的textBox。

所以我需要幫助功能“OpenFileDialogBu​​tton_Click” 。

正是這部分：

filePathText.Text =這是我默認的TextBox名稱，比我開始使用函數手動添加文本框和按鈕。 有必要使它充滿活力。

filePathText.Text = souborFilename;

這是我的問題的圖片：

http://i.imgur.com/z698zAz.jpg http://i.imgur.com/PGJgvjl.jpg

Answer 1

最簡單的方法是使用TextBox和Button創建自定義控件，並在nextDialog Click上添加該控件。

Answer 2

您的按鈕具有可以獲取Object的Tag屬性，嘗試將相關的TextBox名稱放入其中，然后使用Controls.Find方法找到具有該名稱的TextBox。 像這樣的東西。

您修改的NextDialog方法：

private void nextDialog_Click(object sender, EventArgs e)
{
    if (calculate <= 7)
    {
        TextBox text = new TextBox();
        text.Location = new Point(filePathText.Location.X, filePathText.Location.Y + y);
        text.Size = new Size(194, 20);
        text.ReadOnly = true;
        text.Name = "filePathText" + "{calculate}";
        //MessageBox.Show(text.Name);
        this.Controls.Add(text);

        Button button = new Button();
        button.Location = new Point(OpenFileDialogButton.Location.X, OpenFileDialogButton.Location.Y + y);
        button.Size = new Size(33, 24);
        button.Text = "...";
        button.Tag = text.Name;  //Name of associated TextBox added to Tag Property
        button.Click += new EventHandler(OpenFileDialogButton_Click);
        this.Controls.Add(button);

        this.nextDialog.Location = new Point(22, 49 + y);
    }
    else
    {
        this.nextDialog.Controls.Remove(nextDialog);
        this.nextDialog.Dispose();
        MessageBox.Show("Maximální možnost počtů přidaných souborů byla dosažena!");
    }

    y = y + 28;
    calculate++;
}

你的事件處理程序：

private void OpenFileDialogButton_Click(object sender, EventArgs e)
{
    OpenFileDialog openFileDialog1 = new OpenFileDialog();

    if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
    {
        Button btn = sender as Button; //Get the Button that was clicked
        string souborFilename = openFileDialog1.FileName;
        this.Controls.Find((string)btn.Tag), true )[0].Text = souborFilename; //Find textbox that matches stored name
                                                                             //since method returns an array you will
                                                                             //have to access it threw an index.
    }
}

Answer 3

我建議你給你正在創建的新按鈕命名，並根據“OpenFileDialogBu​​tton_Click”中的發件人名稱指定文本框。

button.Name = "btn";

 private void OpenFileDialogButton_Click(object sender, EventArgs e)
    {
        OpenFileDialog openFileDialog1 = new OpenFileDialog();

        if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            string souborFilename = openFileDialog1.FileName;

            string s = ((Button)sender).Name;

            if (s == "btn")
            {
                Newtextbox.Text = "";
            }
            else
                filePathText.Text = souborFilename;
        }
    }

Answer 4

你可以讓你的功能綁定像 -

button.Click += OpenFileDialogButton_Click(text);

你的功能可以像 -

private EventHandler OpenFileDialogButton_Click(TextBox txt){ //Your code  }

它將方便您每次傳遞新創建的文本框對象。

Answer 5

嘗試更改動態OpenFileDialogBu​​tton按鈕的事件處理程序，如下所示：

private void nextDialog_Click(object sender, EventArgs e)
{
  ...
  TextBox text = new TextBox();
  text.Location = new Point(filePathText.Location.X, filePathText.Location.Y + y);
  text.Size = new Size(194, 20);
  text.ReadOnly = true;
  text.Name = "filePathText" + "{calculate}";
  //MessageBox.Show(text.Name);
  this.Controls.Add(text);

  Button button = new Button();
  button.Location = new Point(OpenFileDialogButton.Location.X, OpenFileDialogButton.Location.Y + y);
  button.Size = new Size(33, 24);
  button.Text = "...";

  // -- start changes
  button.Click += (o, args) => {
    using (var opf = new OpenFileDialog()) {
      if (opf.ShowDialog() == DialogResult.OK) {
        var souborFilename = opf.FileName;
        text.Text = souborFilename;
      }
    }
  };
  // -- end changes

  this.Controls.Add(button);

  this.nextDialog.Location = new Point(22, 49 + y);
  ...
}

Answer 6

private void OpenFileDialogButton_Click(object sender, EventArgs e)
    {
        OpenFileDialog openFileDialog1 = new OpenFileDialog();

        if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            string souborFilename = openFileDialog1.FileName;

            foreach (var control in this.Controls)
            {
                if (control is TextBox)
                {
                    TextBox tb = control as TextBox;
                    Button b = sender as Button;
                    if(b != null && tb.Name.Equals("filePathText" + b.Name.Substring(b.Name.Count()-1,1)))
                    {
                        tb.Text = souborFilename;
                    }
                }
            }
            filePathText.Text = souborFilename;
        }
    }

    private void nextDialog_Click(object sender, EventArgs e)
    {
        if (calculate <= 7)
        {
            TextBox text = new TextBox();
            text.Location = new Point(filePathText.Location.X, filePathText.Location.Y + y);
            text.Size = new Size(194, 20);
            text.ReadOnly = true;
            text.Name = "filePathText" + calculate.ToString();
            //MessageBox.Show(text.Name);
            this.Controls.Add(text);

            Button button = new Button();
            button.Location = new Point(OpenFileDialogButton.Location.X, OpenFileDialogButton.Location.Y + y);
            button.Size = new Size(33, 24);
            button.Text = "...";
            button.Click += new EventHandler(OpenFileDialogButton_Click);
            button.Name = "filePathButton" + calculate.ToString();
            this.Controls.Add(button);

            this.nextDialog.Location = new Point(22, 49 + y);
        }
        else
        {
            this.nextDialog.Controls.Remove(nextDialog);
            this.nextDialog.Dispose();
            MessageBox.Show("Maximální možnost počtů přidaných souborů byla dosažena!");
        }

        y = y + 28;
        calculate++;
    }