Question

我使用addrange方法将项目添加到dropdownlist，这是我的代码

ListItem[] cou =
new ListItem[8]{"India",
                "United States",
                "United Kingdom",
                "Canada",
                "Singapore",
                "Australia",
                "Sudia Arabia",
                "South Africa" };
dpcountry.Items.AddRange(cou);

但它给了我错误，因为无法隐式转换字符串ti listitem

请给我一个解决方案

提前谢谢桑吉塔

Answer 1

您需要创建新的ListItems

试

string[] cou =new string[8]{
              "India",
              "United States",
              "United Kingdom",
              "Canada",
              "Singapore",
              "Australia",
              "Sudia Arabia",
              "South Africa" };
dpcountry.Items.AddRange(cou.Select(c => new ListItem(c));

您还需要对System.Linq的引用，

善，

丹

Answer 2

我试过Dan的例子，但是必须添加.ToArray（）才能让它工作，即：

string[] cou =new string[8]{
              "India",
              "United States",
              "United Kingdom",
              "Canada",
              "Singapore",
              "Australia",
              "Saudi Arabia",
              "South Africa" };

dpcountry.Items.AddRange(cou.Select(c => new ListItem(c)).ToArray());

Answer 3

   object []cou = new object[]{"India",
                               "United States",
                               "United Kingdom",
                               "Canada",
                               "Singapore",
                               "Australia",
                               "Sudia Arabia",
                               "South Africa" };
    dpcountry.Items.AddRange(cou);

Answer 4

您正在创建ListItem类型的数组，但您正在尝试向此数组添加字符串。这就是你得到这个错误的原因。要使此代码生效，您应将其更改为：

new ListItem[8]{ new ListItem("India"), new ListItem("United"), /* etcetera */ };

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