动态创建的动态RadioButtonsList

Question

我正在做一个有趣的“调查”表单，并试图通过使过程过于复杂来打破单调乏味的状态。我有一组单选按钮列表，我想从一个名称字符串和一个值字符串中动态创建它们。值不是问题。它创建了所有我都搞不懂的单选按钮列表。

例如，我可以继续这样做：

    string[] level = {"Expert", "Proficient", "Limited Experience", "No Experience"};

    this.rblCSharp.Items.Clear();
    for (int i = 0; i < level.GetLength(0); i++) {
        this.rblCSharp.Items.Add(level[i]);
    }
    this.rblCSharp.RepeatDirection = RepeatDirection.Horizontal;


    this.rblVbNet.Items.Clear();
    for (int i = 0; i < level.GetLength(0); i++)
    {
        this.rblVbNet.Items.Add(level[i]);
    }
    this.rblVbNet.RepeatDirection = RepeatDirection.Horizontal;

...but我不想这么做。我想做更多这样的事情：

    string[] level = {"Expert", "Proficient", "Limited Experience", "No Experience"};

    string[] language = { "CSharp", "VbNet", "VbClassic", "Crystal", "Ssrs", "Sql2005", "UiWeb" };

    for (int j = 0; j < language.GetLength(0); j++) {
        this.rbl[j].Items.Clear();
        for (int i = 0; i < level.GetLength(0); i++) {
            this.rbl[j].Items.Add(level[i]);
        }
        this.rbl[j].RepeatDirection = RepeatDirection.Horizontal;
    }

Answer 1

您需要一种方法来引用与语言对应的RadioButtonList控件。您有一个字符串数组，所以一种方法是使用FindControl，但这不是我的首选。

另一种方法是：

var languageControls = new List<RadioButtonList> { rblCSharp, rblVbNet, rblVbClassic, rblCrystal, rblSsrs, rblSql2005, rblUiWeb };

foreach(var rbl in languageControls)
{
    rbl.Items.Clear();
    // this could be a foreach instead, but I kept your original code
    for (int i = 0; i < level.GetLength(0); i++)
    {
        rbl.Items.Add(level[i]);
    }
    rbl.RepeatDirection = RepeatDirection.Horizontal;
}

FindControl方法(这只有在动态创建和添加RadioButtonList控件时才有意义，而不是在标记中和通过IntelliSense可用)

string[] level = {"Expert", "Proficient", "Limited Experience", "No Experience"};
string[] language = { "CSharp", "VbNet", "VbClassic", "Crystal", "Ssrs", "Sql2005", "UiWeb" };

foreach (string lang in language)
{
    RadioButtonList rbl = (RadioButtonList)FindControl("rbl" + lang);
    if (rbl == null)
        continue;  // keep going through the rest, or throw exception

    rbl.Items.Clear();
    // this could be a foreach instead, but I kept your original code
    for (int i = 0; i < level.GetLength(0); i++)
    {
        rbl.Items.Add(level[i]);
    }
    rbl.RepeatDirection = RepeatDirection.Horizontal;
}