heckboxlist详细用法、checkboxlist用法、checkboxlist

heckboxlist详细用法、checkboxlist用法、checkboxlist

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>