現在我有5個文本框,當領域中的任何一個都留空事實該框爲黃色並在我的標籤中輸出語句「lblError」,出現以下錯誤「」請輸入有效數據!「這在我的catch語句中列出。我希望lblError輸出我爲每個文本列出的文本語句所以如果名字和姓氏都是空白的,那麼lblError就會ou輸入這兩個消息。我是C#的新手,所以對我來說有點困惑。
public partial class frmPersonnel : System.Web.UI.Page
{
protected void btnSubmit_Click(object sender, EventArgs e)
{
try
{
DateTime dt1;
DateTime dt2;
if (txtFirstName.Text == "")
{
txtFirstName.BackColor = System.Drawing.Color.Yellow;
lblError.Text = "Please enter first name";
}
if (txtLastName.Text == "")
{
txtLastName.BackColor = System.Drawing.Color.Yellow;
lblError.Text = "Please enter last name!";
}
if (txtPayRate.Text == "")
{
txtPayRate.BackColor = System.Drawing.Color.Yellow;
lblError.Text = "Please enter pay rate!";
}
if (txtStartDate.Text == "")
{
txtStartDate.BackColor = System.Drawing.Color.Yellow;
lblError.Text = "Please enter start date!";
}
if (txtEndDate.Text == "")
{
txtEndDate.BackColor = System.Drawing.Color.Yellow;
lblError.Text = "Please enter end date!";
}
dt1 = DateTime.Parse(txtStartDate.Text);
dt2 = DateTime.Parse(txtEndDate.Text);
if (DateTime.Compare(dt1, dt2) > 0)
{
txtStartDate.BackColor = System.Drawing.Color.Yellow;
txtEndDate.BackColor = System.Drawing.Color.Yellow;
lblError.Text = "Start Date must not be greater than End Date.";
}
else
{
Session["txtFirstName"] = txtFirstName.Text;
Session["txtLastName"] = txtLastName.Text;
Session["txtPayRate"] = txtPayRate.Text;
Session["txtStartDate"] = txtStartDate.Text;
Session["txtEndDate"] = txtEndDate.Text;
Server.Transfer("frmPersonalVerified.aspx");
}
}
catch (Exception)
{
lblError.Text = "Please enter valid data!";
}
}
}
這就是爲什麼有驗證事件。 – LarsTech