帮我从Combobox获取文本。

本文介绍了帮我从Combobox获取文本。的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 嗨朋友， 如果我使用以下代码，那么我会收到错误（附加信息：InvalidArgument ='2'的值对'index'无效。 ） Dim index1 As 整数 = 0 Dim 电子邮件 As String = ComboBox1.Items.Item（index1）.ToString index1 = index1 + 1 但如果我手动输入索引像0或其他东西那么它的工作原理。如下代码作品 Dim email As String = ComboBox1.Items.Item（ 0 ）。ToString 请告诉我这是什么问题？解决方案 string s =（（yourItemType）yourComboBox.SelectedItem）.yourWishProperty;在C＃ 在这种情况下 Dim email As String =（（string）ComboBox1.SelectedItem） .text 使用此 Dim index1 As 整数 = 0 在你的函数之外并公开你的变量然后使用它 如果你使用一个计时器，那么 index1 可能高于 Items 的最高索引。在您尝试从组合框中获取项目之前，请检查是否可能： 如果 ComboBox1.Items.Count> index1 然后 Dim 电子邮件 As 字符串 = ComboBox1.Items.Item（index1）.ToString index1 = index1 + 1 否则 ' index1 is高于组合框项目的最高索引 结束 如果 Hi Friend,If I use following code then I get error (Additional information: InvalidArgument=Value of '2' is not valid for 'index'.)Dim index1 As Integer = 0Dim email As String = ComboBox1.Items.Item(index1).ToStringindex1 = index1 + 1But If I manually put index like 0 or something else then it works. Like following code worksDim email As String = ComboBox1.Items.Item(0).ToStringPlease tell me what's the problem is? 解决方案 string s = ((yourItemType)yourComboBox.SelectedItem).yourWishProperty; in C#In this case Dim email As String = ((string)ComboBox1.SelectedItem).textUse this Dim index1 As Integer = 0 outside of your function and make your variable public and then use itIf you use a timer, then index1 becomes probably higher than the highest index of Items. Before you try to get the item from the combobox, check whether it is possible:If ComboBox1.Items.Count > index1 Then Dim email As String = ComboBox1.Items.Item(index1).ToString index1 = index1 + 1Else ' index1 is higher than the highest index of the combobox itemsEnd If 这篇关于帮我从Combobox获取文本。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！