在C中更改StreamReader文件擴展名＃

Question

我正在製作一個項目，該項目使用條形碼來存儲與項目有關的信息。對於每個條形碼，都有一個包含其信息的文本文件。例如，條形碼0000000025將其所有信息存儲在名爲0000000025.txt的文件中。我希望能夠將條形碼輸入到文本框中，並根據條形碼告知StreamReader要從中讀取哪個文件。代替手工編碼300，如果是這樣else語句：StreamReader("C:\\ITRS_equipment_log\\0000000025.txt");

有沒有辦法告訴它

StreamReader("C:\\ITRS_equipment_log\\"*pull the barcode from the first textbox and put it here*".txt"); 

感謝

private void buttonSubmit_Click(object sender, EventArgs e) 
{  
    if (!String.IsNullOrEmpty(textBox1.Text)) 
    { 
     textBox1.SelectionStart = 0; 
     textBox1.SelectionLength = textBox1.Text.Length; 

     TextReader textReader = new StreamReader("C:\\ITRS_equipment_log\\0000000025.txt"); 

     //model textbox receives the model of equipment associated with barcode in the text file 
     modelTextbox.Text = textReader.ReadLine(); 

     //serial textbox receives the serial number of equipment associated with barcode in the text file 
     serialTextbox.Text = textReader.ReadLine(); 

     //history textbox receives the history of equipment associated with barcode in the text file 
     historyTextbox.Text = textReader.ReadToEnd(); 
     textReader.Close(); 

    } 
} 

Answer 1

這應該條形碼文本插入到你的文件名：

TextReader textReader 
    = new StreamReader(String.Format(@"C:\ITRS_equipment_log\{0}.txt", textBox1.Text));