显示标签的项目列表。 [英] Displaying the list of items to the label.

问题描述

大家好，

我正在使用清单来查明列表中选择了多少项。所以我使用数组列表来收集项目，但无法在标签中显示。请建议我这样做。

Hello all,
I am working with checklist to find out how many items are selected in the list. So I am using array List to collect the items but unable to display in the label. Please suggest me to do this.

ArrayList alist=new ArrayList();
        for (int i = 0; i < chkList.Items.Count; i++)
        {
            if (chkList.Items[i].Selected)
            {
                alist.Add(chkList.Items[i].Value);
            }

        }

        lbl.Text = alist;

//这里将列表项分配给标签





输出：

System.ArrayList.Collections

// Here assigning the list items to label


OUTPUT:
System.ArrayList.Collections

推荐答案

如果您想在标签中显示checkboklist的所有选中项目，请尝试以下代码：

If You want to show all the checked item of checkboklist in label than try below code:

ArrayList alist = new ArrayList();
for (int i = 0; i < chkList.Items.Count; i++)
{
    if (chkList.Items[i].Selected)
    {
        alist.Add(chkList.Items[i].Value);
        label.text = label.text + "," + chkList.Items[i].Text; // add this line in your code
    }
}

这里唯一的问题就是这条线

The only problem here is with this line

lbl.Text = alist;

因为arraylist是一个集合所以，你将不得不遍历列表

Since, arraylist is a collection so, you will have to iterate through the list

lbl.Text="";
foreach(string value in alist)
{
    lbl.Text = lbl.Text + value;
}

我假设你在arraylist中存储字符串值。如果有任何其他数据类型，请进行正确的类型转换。

I am assuming you are storing string values in arraylist. If any other data type, please do proper type cast.

通过LINQ：

By means of LINQ:

var itemQuery = from e in chkList.Items.Cast<ListItem>() where e.Selected select e.Text;
lbl.Text = string.Join(", ", itemQuery);

干杯

Andi

Cheers
Andi

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