C# 如何以编程方式设置 winforms Checkedlistbox 中所有项目的选中状态？
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How do I set the checked state of all items in a winforms Checkedlistbox programmatically?
提问by Hardik
I am working on a Windows form Application.
I want to check/uncheckall checkboxes in checkedlistbox.
我正在处理 Windows 窗体应用程序。我想要check/uncheck检查列表框中的所有复选框。
I am using following code to generate checkboxes dynamically.
我正在使用以下代码动态生成复选框。
var CheckCollection = new List<CheckedBoxFiller>();
foreach (DataRow dr in dt.Rows)
CheckCollection.Add(new CheckedBoxFiller {
Text = dr["ImageName"].ToString(),
Value = dr["ImageId"].ToString()
});
chklbEvidenceTags.DataSource = CheckCollection;
chklbEvidenceTags.DisplayMember = "Text";
chklbEvidenceTags.ValueMember = "Value";
And this is the CheckboxFiller class
这是 CheckboxFiller 类
private class CheckedBoxFiller {
public string Text { get; set; }
public string Value { get; set; }
}
Now I want to check/Uncheckall checkboxes. How can I achieve this?
现在我想check/Uncheckall checkboxes。我怎样才能做到这一点？
Any help would be useful.
任何帮助都会有用。
采纳答案by Hardik
I found solution.
我找到了解决方案。
for (int i = 0; i < chklistbox.Items.Count; i++)
chklistbox.SetItemCheckState(i, (state ? CheckState.Checked : CheckState.Unchecked));
stateis boolenvalue.
state是boolen价值。
回答by brsfan
If you have a large Items list, this approach may be a little more efficient for uncheckingitems. It requires you only cycle through the items that are actually checked:
如果您有一个很大的 Items 列表，这种方法对于取消选中项目可能会更有效一些。它要求您只循环查看实际检查的项目：
private void UncheckAllItems()
{
while (chklistbox.CheckedIndices.Count > 0)
chklistbox.SetItemChecked(chklistbox.CheckedIndices[0], false);
}
And if you use multiple CheckedListBox controls throughout your project and wanted to take it a step further, it could be added as an extension method:
如果您在整个项目中使用多个 CheckedListBox 控件并希望更进一步，可以将其添加为扩展方法：
public static class AppExtensions
{
public static void UncheckAllItems(this System.Windows.Forms.CheckedListBox clb)
{
while (clb.CheckedIndices.Count > 0)
clb.SetItemChecked(clb.CheckedIndices[0], false);
}
}
Extension method call:
扩展方法调用：
chklistbox.UncheckAllItems();
回答by ramesh choudhury
To Uncheck/Check all listItems Do the below Code:
要取消选中/选中所有列表项，请执行以下代码：
boolean state =false;//False->Uncheck,true->Check
for (int i = 0; i < chklistbox.Items.Count; i++)
chklistbox.SetItemCheckState(i, (state ? CheckState.Checked : CheckState.Unchecked));
回答by Anjan Kant
Check/Uncheck all list items written below code:
选中/取消选中以下代码编写的所有列表项：
if (checkBox1.Checked)
{
for (int i = 0; i < chkboxlst.Items.Count; i++)
{
chkboxlst.SetItemChecked(i, true);
}
}
else
{
for (int i = 0; i < chkboxlst.Items.Count; i++)
{
chkboxlst.SetItemChecked(i, false);
}
}
