如何在Asp.Net中自动增加日期格式的月份？ [英] How Can I Auto Increment Month In Date Format In Asp.Net ?

问题描述

我在自动增量方面遇到问题，

它逐月递增但不是我想要的方式..

我希望月份数应该增加每个for循环中的时间，但在我的代码中它增加1次，其余条目相同..

输出应该是：如果当前日期是13/3/2014

然后 - 对于i = 0> 13/4/2014

i = 1> 13/5/2014

i = 2> 2014年3月13日...



这里我的代码..

i am facing a problem in auto increment,
it increments month by one but not the way i want ..
I want the month number should be increment each time in for loop,but here in my code it increments for 1 time and rest of the entries are same ..
output should be:if current date is 13/3/2014
then--for i=0 > 13/4/2014
i=1 > 13/5/2014
i=2 > 13/6/2014...

here i my code..

for (int i = 0; i <= int.Parse(txt_bank1.Text); i++)
            {
              
                DateTime InstallDate =Convert.ToDateTime(txt_dated.Text);
               
                DataTable dt = conn.filldatatable("ERP.sp_InstallmentMaster_Insert '" + txt_enqno.Text + "'," + Convert.ToDecimal(txt_monthInstall.Text) + ",'" + InstallDate + "','0'," + Convert.ToDecimal(txt_monthInstall.Text) + ",'True'");

            }

请建议更好的方法。

please do suggest a better way.

推荐答案

首先在循环外部移动一些代码：

Start by moving some of the code outside the loop:

decimal month;
if (!decimal.TryParse(txt_monthInstall.Text, out month))
    {
    // Report input problem to user
    }
else
    {
    DateTime InstallDate;
    if (!DateTime.TryParse(txt_dated.Text, out InstallDate))
        {
        // Report input problem to user
        }
    else
        {
        for (int i = 0; i <= int.Parse(txt_bank1.Text); i++)
            {
            conn.filldatatable("ERP.sp_InstallmentMaster_Insert '" + txt_enqno.Text + "'," + month + ",'" + InstallDate + "','0'," + month + ",'True'");
            month++;
            }
        }
    }

然后，找到一种不涉及连接字符串的方法：永远不要连接字符串来构建SQL命令。它让您对意外或故意的SQL注入攻击持开放态度，这可能会破坏您的整个数据库。请改用参数化查询。

Then, find a way to do that that doesn't involve concatenating strings: Never concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.

谢谢你的宝贵答案..

i欣赏它，但我已经通过简单的方式解决了它..

这里是..

thank you for youa valuable answer ..
i appreciate it ,but i have solved it by easy way ..
here t is ..

for (int i = 0; i <= int.Parse(txt_bank1.Text); i++)
            {
                DateTime dtchk = Convert.ToDateTime(txt_dated.Text);

                DateTime InstallDate = dtchk.AddMonths(1);

                DataTable dt = conn.filldatatable("ERP.sp_InstallmentMaster_Insert '" + txt_enqno.Text + "'," + Convert.ToDecimal(txt_monthInstall.Text) + ",'" + InstallDate + "','0'," + Convert.ToDecimal(txt_monthInstall.Text) + ",'True'");
                txt_dated.Text = InstallDate.ToString();
            }

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