C#：如何确保在执行操作之前在 ListView 中选择了行或项目？
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C#: How do you make sure that a row or item is selected in ListView before performing an action?
提问by
What is the best way to check if there is atleast a selected item in a listview or not in an if statement?
检查列表视图中是否至少有一个选定项目或在 if 语句中没有的最佳方法是什么？
采纳答案by JaredPar
I'm not entirely sure what you are asking. Do you want to make sure at least 1 item is selected before running an action? If so the following should work
我不完全确定你在问什么。是否要确保在运行操作之前至少选择了 1 个项目？如果是这样，以下应该有效
if ( listView.SelectedItems.Count > 0 ) {
// Do something
}
Or are you curious if a particular item is selected? If so try the following
或者您是否好奇是否选择了特定项目？如果是这样，请尝试以下操作
if ( listView.SelectedItems.Contains(someItem)) {
// Do something
}
回答by Winston Smith
if( listView.SelectedItems.Count > 0 ){
// do stuff here
}
回答by Louie Bacaj
You can also check the value of a selected item or perhaps bind it to a string if needed:
您还可以检查所选项目的值，或者根据需要将其绑定到字符串：
//Below is with string
String member = (String)ListView1.SelectedValue;
//Below is with any class
AnyClass member = (AnyClass)ListView1.SelectedValue;
String StaffID = member.StaffID;
回答by Ahmad Al-taher
//Here a simple loop that go through all the items in the list
for (int i = 0; i < listView1.Items.Count; i++)
{
//checks if the item in the list has the value true to the properties checked
if (listView1.Items[x].Checked == true)
{//your code
//e.g.
listView1.Items[x].Checked = false;
}
}
回答by hetuka kodekar
You can also check count of the selected item list by using getCheckedItemCount() method of the listview. for example,
您还可以使用列表视图的 getCheckedItemCount() 方法检查所选项目列表的计数。例如，
if( listview.getCheckedItemCount() > 0 ) {
如果（listview.getCheckedItemCount（）> 0）{
// do stuff here
}
}
回答by TaTa
int taskId = Convert.ToInt32(itemRow.SubItems[0].Text);
int taskId = Convert.ToInt32(itemRow.SubItems[0].Text);
string taskDate = itemRow.SubItems1.ToString();
string taskDate = itemRow.SubItems 1.ToString();
string taskDescription = itemRow.SubItems[2].ToString();enter image description here
string taskDescription = itemRow.SubItems[2].ToString(); 在此处输入图片说明
