checkboxlist的使用
for (int i = 0; i < CheckBoxList1.Items.Count; i++)
{
if (CheckBoxList1.Items[i].Selected)
Response.Write("你选的是" +CheckBoxList1.Items[i].Value+ CheckBoxList1.Items[i].Text + "<br>");
}
利用循环来顺序遍历每个选项，被选中的输出.
for (int i = 0; i < hfAnswers.Value.Split(',').Length; i++)//给CheckBoxList选中的复选框 赋值 {
for (int j = 0; j < CBoxListAnswer.Items.Count; j++)
{
if (hfAnswers.Value.Split(',')[i] == CBoxListAnswer.Items[j].Value)
{
CBoxListAnswer.Items[j].Selected = true;
}
}
}
string m_strTemp = string.Empty;
for (int i = 0; i < CBoxListAnswer.Items.Count; i++)//读取CheckBoxList 选中的值,保存起来 {
if (CBoxListAnswer.Items[i].Selected)
{
m_strTemp += CBoxListAnswer.Items[i].Value + ",";
}
}
if (!string.IsNullOrEmpty(m_strTemp))
Label1.Text = m_strTemp.Substring(0, m_strTemp.Length - 1);
else
Label1.Text = m_strTemp;
1.绑定数据
this.lngCatalogID.DataSource = dt; //这里我绑到DataTable上了.
this.lngCatalogID.DataTextField = "strCatalogName"; //前台看到的值,也就是CheckBoxList中显示出来的值
this.lngCatalogID.DataValueField = "lngCatalogID"; //这个值直接在页面上是看不到的,但在源代码中可以看到
this.lngCatalogID.DataBind();
2.获取钩选的项
foreach(ListItem li in lngCatalogID.Items)
{
if(li.Selected) //表示某一项被选中了
{
//li.Test表示看到的值,对应上面的strCatalogName
//li.Value表示看到的值对应的值.对应上面的lngCatalogID
}
}
3.设置某项为钩选状态
foreach(ListItem li in lngCatalogID.Items)
{
if(li.Value.Equals("钩选条件")) //如果li.Value值等于某值,就钩选
{
li.Selected = true; //等于true就表示钩选啦.
break;
}
}
数据绑定
checkedListBox1.DataSource=ds.Tables[0];
checkedListBox1.ValueMember="intSectionID";
checkedListBox1.DisplayMember="txtShortDesc".ToString();
数据显示
int count = checkedListBox1.Items.Count;
for (int i = 0;i<count;i++)
{
if (checkedListBox1.GetItemChecked(i))
{
MessageBox.Show(checkedListBox1.Items[i].ToString());
}
}
DataGrid中全选
foreach(DataGridItem thisItem in DataGridLogininfo.Items)
{
((CheckBox)thisItem.Cells[0].Controls[1]).Checked = CheckBox2.Checked;
}
反向选择
for (int i = 0; i < checkedListBox1.Items.Count; i++)
{
if (checkedListBox1.GetItemChecked(i))
{
checkedListBox1.SetItemChecked(i, false);
}
else
{
checkedListBox1.SetItemChecked(i, true);
}
}
checkboxlist控件用法范例
范例一：
<script language="c#" runat="server">
public void Item_changed(Object sender,EventArgs e)
{
string str;
foreach(ListItem item in cblist.Items)
{
if(item.Selected)
mylabel.Text+="<hr><li>"+item.Text;
}
}
</script>
<html>
<head><title>checkbox test page</title></head>
<body>
<form runat="server">
<asp:checkboxlist id="cblist" runat="server">
<asp:listitem text="checkbox1"/>
<asp:listitem text="checkbox2"/>
<asp:listitem text="checkbox3"/>
<asp:listitem text="checkbox4"/>
</asp:checkboxlist>
<asp:button id="btn1" text="click me" OnClick="Item_changed" runat="server"/>
<hr>
<asp:label id="mylabel" runat="server"/>
</form>
</body>
</html>
