protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
String StrCategory = Request.QueryString["category"];
Label1.Text = "(" + StrCategory + ")";
if (StrCategory == "")
{
StrCategory = "*";}
Label2.Text = "(" + StrCategory + ")";
}
}
}
Label1能显示成(),但Label2不能.哪里错了?求达人指点,我刚学不久.
{
if (!IsPostBack)
{
String StrCategory = Request.QueryString["category"];
Label1.Text = "(" + StrCategory + ")";
if (StrCategory == "")
{
StrCategory = "*";}
Label2.Text = "(" + StrCategory + ")";
}
}
}
Label1能显示成(),但Label2不能.哪里错了?求达人指点,我刚学不久.
===
if (StrCategory == "" &&StrCategory ==null )
if (String.IsNullOrEmpty(StrCategory))
{
//todo
}