Question

如果文件中包含字符串，则一切正常。如果文件不包含字符串，我只需要一条消息。 MessageBox未显示或无限循环显示。我尝试了假/真，但它没有用。

TextFieldParser sprawdz = new TextFieldParser("C:\\wykaz_druk.csv");
string currentLine;
string searchcsv = textBox_SPR_SEARCH.Text;
sprawdz.TextFieldType = FieldType.Delimited;
sprawdz.Delimiters = new string[] { ";" };
sprawdz.TrimWhiteSpace = true;

bool check = false; 
do
{
    currentLine = sprawdz.ReadLine();
    if (currentLine != null)
    {
        check = true; 
        string file = currentLine;
        string serial = file.Split(';')[2].Trim();
        string adresip = file.Split(';')[3].Trim();
        if (adresip == searchcsv || serial == searchcsv)
        {
            textBox2.Text = serial;
            textBox4.Text = adresip;
        }
    }
} while (currentLine != null);
if (check == false) 
{
    MessageBox.Show("Error");
}

我也试过if / else但是它仍然无法工作：

TextFieldParser sprawdz = new TextFieldParser("C:\\wykaz_druk.csv");
string currentLine;
string searchcsv = textBox_SPR_SEARCH.Text;
sprawdz.TextFieldType = FieldType.Delimited;
sprawdz.Delimiters = new string[] { ";" };
sprawdz.TrimWhiteSpace = true;

while (!sprawdz.EndOfData)
{
    currentLine = sprawdz.ReadLine();
    if (currentLine != null)
    {
        string file = currentLine;
        string serial = file.Split(';')[2].Trim();
        string adresip = file.Split(';')[3].Trim();
        if (adresip == searchcsv || serial == searchcsv)
        {
            textBox2.Text = serial;
            textBox4.Text = adresip;
        }
    }
    else
    {
        MessageBox.Show("Error");
        break;
    }
}

Answer 1

我怀疑你要分配：

check = true;

在错误的地方。

在此处移动该支票：

if (adresip == searchcsv || serial == searchcsv)
{
    check = true;    // <-- insert here
    textBox2.Text = serial;
    textBox4.Text = adresip;
}

解析CSV =文件不包含字符串

1 个答案: