Question

这是我的错误 enter image description here

即使我尝试过：dtp_ngaycap.Value它仍然证实了我的错误。这是CNcommands类

的代码

   public bool CNcommands(string commandType,string tenchunha,string nguoidaidien, string chucvu, int soCMDN, DateTime ngaycap, string diachi, string masothue, string nguoithuhuong, string sotaikhoan,string nganhang,string sodienthoai, string diachiemail, string diachinganhang, int maCN)
    {
        if (commandType == "insert")
        {
            string insertCN = "INSERT INTO [QLThueNha].[dbo].[ChuNha][MaChuNha],[TenChuNha],[Nguoidaidien],[Chucvu],[SoCMND],[Ngaycap],[Diachi],[Masothue],[Nguoithuhuong],[Sotaikhoan],[Nganhang],[Sodienthoai],[DiachimailCN],[Diachinganhang])VALUES('" + tenchunha + "','" + nguoidaidien + "','" + chucvu + "','" + soCMDN + "','" + ngaycap + "','" + diachi + "','" + masothue + "','" + nguoithuhuong + "','" + sotaikhoan + "','" + nganhang + "','" + sodienthoai + "','" + diachiemail + "','" + diachinganhang + "')";
            if (executeQuery(insertCN, ref rowAffect_) == true && rowAffect_ == 1)
            {
                return true;
            }
            return true;
        }
        else if (commandType == "update")
        {
            string updateCN = "UPDATE [QLThueNha].[dbo].[ChuNha]  SET [TenChuNha] = '" + tenchunha + "',[Nguoidaidien] = '" + nguoidaidien + "',[Chucvu] = '" + chucvu + "',[SoCMND] = '" + soCMDN + "',[Ngaycap] = '" + ngaycap + "',[Diachi] = '" + diachi + "',[Masothue] = '" + masothue + "',[Nguoithuhuong] = '" + nguoithuhuong + "',[Sotaikhoan] = '" + sotaikhoan + "',[Nganhang] = '" + nganhang + "',[Sodienthoai] = '" + sodienthoai + "',[DiachimailCN] = '" + diachiemail + "',[Diachinganhang] = '" + diachinganhang + "' WHERE <Search Conditions,,>";
            if (executeQuery(updateCN, ref rowAffect_) == true && rowAffect_ == 1)
            {
                return true;
            }
            return true;
        }
        else
        {
            return false;
        }
        //if (commandType == "delete")
        //{
        //    string deleteCN = "SET [TenChuNha] = '" + tenchunha + "',[Nguoidaidien] = '" + nguoidaidien + "',[Chucvu] = '" + chucvu + "',[SoCMND] = '" + soCMDN + "',[Ngaycap] = '" + ngaycap + "',[Diachi] = '" + diachi + "',[Masothue] = '" + masothue + "',[Nguoithuhuong] = '" + nguoithuhuong + "',[Sotaikhoan] = '" + sotaikhoan + "',[Nganhang] = '" + nganhang + "',[Sodienthoai] = '" + sodienthoai + "',[DiachimailCN] = '" + diachiemail + "',[Diachinganhang] = '" + diachinganhang + "' WHERE <Search Conditions,,>";
        //    if (executeQuery(deleteCN, ref rowAffect_) == true && rowAffect_ == 1)
        //    {
        //        return true;
        //    }
        //}

    }

Answer 1

由于您传递给FormatException方法的最后一个参数，会抛出

CNcommands：

int.Parse("");

如果您使用Convert.ToDateTime("");，请检查DateTimePicker //注意，然后无需解析为Convert.ToDateTime，因为dateTimePicker.Value为DateTime。

并检查int.Parse(txt_sosmdn.Text)

但是你也应该考虑重新分解你的方法。

Answer 2

问题是你试图将无效值解析为int .. int.Parse将number的字符串表示形式转换为其32位有符号整数等价物。并且该字符串必须是有效数字，因此在那里提供有效数字..

像

    int.Parse("0");

错误日期时间选择器转换

2 个答案: