从列表框中插入多个值 [英] insert multiple value from listbox

问题描述

我做了这个编码，但我发现错误是什么......



==>两个列表框==> lst_leftstar和lst_rightstar

项目从lst_leftstar传递到lst_rightstar

和

编码为==>> lst_rightstar值存储在数据库中。



==>> 2张桌子

==> < 1为卤素; starmaster

starid

star



==>> < 2 - ;简介明星

profilestar

starid



xml查询完美写好

但是问题在于编码..

我的代码是：=

i done this coding but i cant find that what is the mistake....

==>two listbox ==> lst_leftstar and lst_rightstar
items pass from lst_leftstar to lst_rightstar
and
coding for ==>> lst_rightstar values store in database.

==>> 2 tables
==> <1> starmaster
starid
star

==>> <2> profile star
profilestar
starid

xml query is perfect written
but problem is in the coding..
my code is :=

protected void btnsumit_partner_details_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();

        dt.Columns.Add("Star_Id");

        for (int i = 0; i < lst_rightstar.Items.Count; i++)
        {
            dt.Rows.Add("");

            dt.Rows[i]["Star_Name"] = lst_rightstar.Items[i].Value;
        }

        clsregisterinfo.Dtstd = dt;
        clsregisterinfo.insert_data();
    }

==>我的问题在这里。

当id调试时我看到... for循环不起作用..

表示...当我跟踪代码时... .i无法进入for循环..

和vales在类文件中传递null。

==> my problm is here.
that when id debug i see that...for loop isn't worked..
means...when i trace the code...i cant enter in for loop..
and vales pass null in class file.

推荐答案

即使你的问题有点模糊，但根据我的理解问题如下，这就是为什么它没有进入 for loop



我想您正在尝试将项目从 lst_leftstar 移至 lst_rightstar ，并且在开始时您将尝试移动一个项目从左到右，右侧列表框将为空，即item.count = 0.因此它不会进入循环。



我想你替换这个

Even though your question is bit vague, but as per my understanding problem is as below and this is the reason why its not entering the for loop

I think you are trying to move item from the lst_leftstar to lst_rightstar, and when at the start you will try to move an item from left to right, the right listbox will be empty i.e. item.count = 0. hence it will not enter for loop.

and I think you replace this

Quote：

for（int i = 0; i< lst_rightstar.Items.Count; i ++）

for (int i = 0; i < lst_rightstar.Items.Count; i++)

with

with

for (int i = 0; i < lst_leftstar.Items.Count; i++)

我希望它能解决你没有进入for循环的问题。



循环有一个列不匹配的错误。



一开始你要添加一个名为Star_Id的列

I hope it will solve your problem of not entering in for loop.

Further inside the loop there is a mistake of column mismatch.

on the start you are adding a column named Star_Id

引用：

dt.Columns.Add（Star_Id）;

dt.Columns.Add("Star_Id");

在循环内你试图在

引用中输入值：

dt.Rows [i] [Star_Name]

dt.Rows[i]["Star_Name"]

即名为Star_Name的列，您之前未添加..



希望它能帮到你.. :)

i.e. Column Named as Star_Name which you have not added before..

Hope it will help you.. :)

抱歉，我......忘了告诉你..那个/>
i使用javascript将项目从lst_leftstar移动到lst_rightstar（双击）

。

此编码仅适用于数据库中插入lst_rightstar项目。

我有这个问题（for loop）

sorry dr...i forgot to tell you..that
i move items from lst_leftstar to lst_rightstar using javascript(doubleclick)
.
this coding is just only for insert lst_rightstar items in database..
and i have this problem(for loop)

protected void btnsumit_partner_details_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
 
        dt.Columns.Add("Star_Id");
 
        for (int i = 0; i < lst_rightstar.Items.Count; i++)
        {
            dt.Rows.Add("");
 
            dt.Rows[i]["Star_Id"] = lst_rightstar.Items[i].Value;
        }
 
        clsregisterinfo.Dtstd = dt;
        clsregisterinfo.insert_data();
    }

请再次查看或循环

please check it again or loop

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