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Question

我正在使用addrange方法將項目添加到dropdownlist中，這是我的代碼

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

但這給了我錯誤，因為無法隱式轉換字符串ti listitem

請給我一個解決方案

在此先感謝sangita

Answer 1

您需要創建新的ListItems

嘗試

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));

您還將需要引用System.Linq，

善良，

擔

Answer 2

我嘗試了Dan的示例，但是必須添加.ToArray（）使其起作用，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

您正在創建類型為ListItem的數組，但是您正在嘗試向該數組添加字符串。 這就是為什么您會收到此錯誤。 要使此代碼正常工作，您應該將其更改為：

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