如何從c中同一個按鈕中填充多個文本框

Question

如果上面的文本框已經填滿，我想要一個按鈕來填充多個文本框。 I.E. IF textbox1 = file.shp THEN textbox2 = openFileDialog

我試着做一些長度函數，但是當我選擇一個文件時，textbox1和2都被填充。

private void button1_Click(object sender, EventArgs e) 
    { 

      OpenFileDialog openFileDialog1 = new OpenFileDialog(); 

      openFileDialog1.InitialDirectory = @"C:\WCGIS\GEOG489\Final\SHP"; 
      openFileDialog1.Title = "Browse Text Files"; 

      openFileDialog1.CheckFileExists = true; 
      openFileDialog1.CheckPathExists = true; 

      openFileDialog1.DefaultExt = "txt"; 
      openFileDialog1.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*"; 
      openFileDialog1.FilterIndex = 2; 
      openFileDialog1.RestoreDirectory = true; 

      openFileDialog1.ReadOnlyChecked = true; 
      openFileDialog1.ShowReadOnly = true; 

      if (openFileDialog1.ShowDialog() == DialogResult.OK) 
      { 
       textBox1.Text = openFileDialog1.FileName; 

       if (textBox1.Text.Length > 1) 
       { 
        textBox2.Text = openFileDialog1.FileName; 
       } 


     } 

    } 

我希望能夠有一個新的文本框填充每次我點擊「add shape文件」按鈕。如果textbox1已被佔用，我希望textbox2填充。

Answer 1

你需要先檢查您的文本框的長度是這樣的：

if (openFileDialog1.ShowDialog() == DialogResult.OK) 
{ 
    if (textBox1.Text.Length <= 1) 
    { 
     textBox1.Text = openFileDialog1.FileName; 
    } 
    else 
    { 
     if (textBox2.Text.Length <= 1) 
     { 
      textBox2.Text = openFileDialog1.FileName; 
     } 
     else 
     {     
      //and so on... 
     } 
    } 
} 

Answer 2

if (openFileDialog1.ShowDialog() == DialogResult.OK) 
{ 
    textBox1.Text = openFileDialog1.FileName; 

有了這個，你總是填補第一個文本框。然後

if (textBox1.Text.Length > 1) 
    { 
     textBox2.Text = openFileDialog1.FileName; 

這會填滿第二個文本框。

解決方案：檢查第一個文本框填滿你往裏面以前：

if (textBox1.Text.Length > 0) // if textBox1 was already filled 
    textBox2.Text = openFileDialog1.FileName; // fill textBox2 
else // if textBox1 was still empty 
    textBox1.Text = openFileDialog1.FileName; // fill textBox1 first