ASP.NET(C#)驗證數位兩種方法_實用技巧

方法一：

複製代碼 代碼如下:

int i=0;
if (!int.TryParse(this.txtPage.Text, out i))
{
   Response.Write("<script>alert('請輸入有效數字！')</script>");
   this.txtPage.Text = string.Empty;
 }//判斷是否是數字
 

方法二：

複製代碼 代碼如下:

try
        {

            if (Convert.ToInt32(this.txtPage.Text) > totalPage || Convert.ToInt32(this.txtPage.Text)<1)
            {
                ClientScript.RegisterClientScriptBlock(GetType(), "提示", "alert('請輸入有效數字！')", true);
            }
            else
            {
              ViewState["pageindex"] = this.txtPage.Text;
              GetData();
            }
        }
        catch (Exception)
        {
           ClientScript.RegisterClientScriptBlock(GetType(), "提示", "alert('請輸入有效數字！')", true);
        }