如何检查新项目添加是否在组合框项目列表中 [英] how to check new item adding is in combo box item list

问题描述

相同的组合框项目中如何检查添加到combox的新项目.

你能帮我吗?
我尝试了以下代码...

how to check new item adding to the combox is in the same combobox items.

can u plz help me..
i tried following code...

for (int i = 0; i <= cmbdep.Items.Count; i++)
                  {
                      if (cmbdep.Text == cmbdep.Items.ToString())
                      {
                          c = 1;
                          break;
                      }
                      else
                      {
                          c = 0;
                      }
                  }

但不起作用...

but not working...

推荐答案

我不确定您为什么认为这会起作用.为什么不使用foreach遍历项目? Items.ToString()显然未使用您的索引.尝试Items [i] .Text，这意味着您不会一遍又一遍地检查同一件事，而是检查每个单独的项目.

另外，为什么用"c"代替布尔值?

I am not sure why you think this will work. Why not use foreach to iterate over the items ? Items.ToString() is obviously not using your index. Try Items[i].Text, that would mean you were not checking the same thing over and over, but instead checking each individual item.

Also, why use ''c'' instead of a bool ?

这一切都没有意义，外加一些错误:

与项目数量相比，您的迭代次数增加了一个；在循环结束条件中使用<而不是<=.

同样，cmbdep.Items.ToString()不会返回您期望的结果.您可能需要按索引的项目，因此请使用cmbdep.Items[i].ToString().

c的计算没有任何意义.您是否只想检查文本是否为其中一项? (您不必回答.:-))

—SA

It all makes no sense, plus a couple of bugs:

You make one iteration more that the number of items; use < instead of <= in the loop ending condition.

Also, cmbdep.Items.ToString() will not return what you expect. You probably wanted an item by index, so use cmbdep.Items[i].ToString().

The calculation if c makes no sense. Do you simply want check up if the text is one of the items? (You don''t have to answer. :-))

—SA

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