如何检查新项目添加是否在组合框项目列表中

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...

答

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

如何检查新项目添加是否在组合框项目列表中

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