先看看DataList控件,它的使用最郁闷的是不能在IDE环境里绑定数据,而只能用模板(不知道是不是我没学会)。
<asp:DataList id="DataList1" runat="server" Width="100%" Visible="False" CssClass="s_verdana"
RepeatDirection="Horizontal" ForeColor="Black" BorderColor="#999999" BorderStyle="Solid" BackColor="Silver"
CellPadding="1" GridLines="Vertical" BorderWidth="1px" RepeatColumns="4" DataKeyField="c_id">
<SelectedItemStyle Font-Bold="True" ForeColor="White" BackColor="#000099"></SelectedItemStyle>
<AlternatingItemStyle BackColor="#CCCCCC"></AlternatingItemStyle>
<ItemTemplate>
<asp:CheckBox Runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.c_loginName")%>'>
</asp:CheckBox>
</ItemTemplate>
数据绑定:
RepeatDirection="Horizontal" ForeColor="Black" BorderColor="#999999" BorderStyle="Solid" BackColor="Silver"
CellPadding="1" GridLines="Vertical" BorderWidth="1px" RepeatColumns="4" DataKeyField="c_id">
<SelectedItemStyle Font-Bold="True" ForeColor="White" BackColor="#000099"></SelectedItemStyle>
<AlternatingItemStyle BackColor="#CCCCCC"></AlternatingItemStyle>
<ItemTemplate>
<asp:CheckBox Runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.c_loginName")%>'>
</asp:CheckBox>
</ItemTemplate>
this.DataList1.DataSource = m_table.DefaultView;
this.DataList1.DataKeyField = "c_id";
this.DataList1.DataBind();
看上去和DataGrid一样不是吗?可问题是:这里我这里使用了CheckBox,也就是说用户到时候要选择其中的部份数据,然后提交回来,结果是:你很难得在DataGrid里取回绑定的数据列。。。。。this.DataList1.DataKeyField = "c_id";
this.DataList1.DataBind();
再看RadioButtonList:
<asp:RadioButtonList id="RadioButtonList_MsgType" runat="server" Width="440px" RepeatDirection="Horizontal"
CssClass="s_verdana">
<asp:ListItem Value="0" Selected="True">All</asp:ListItem>
<asp:ListItem Value="1">All Client</asp:ListItem>
<asp:ListItem Value="2">All Users</asp:ListItem>
<asp:ListItem Value="3">Sperical</asp:ListItem>
</asp:RadioButtonList>
这里我只使用了静态的数据,因为这里并没有很多的数据显示。但有一点小问题:我想在上面加一个JavaScript事件,用来响应用户操作,于是我在后台添加代码:CssClass="s_verdana">
<asp:ListItem Value="0" Selected="True">All</asp:ListItem>
<asp:ListItem Value="1">All Client</asp:ListItem>
<asp:ListItem Value="2">All Users</asp:ListItem>
<asp:ListItem Value="3">Sperical</asp:ListItem>
</asp:RadioButtonList>
private void RadioButtonList_MsgType_Load(object sender, System.EventArgs e)
{
RadioButtonList m_obj = sender as RadioButtonList;
m_obj.Attributes.Add("onclick","alert()");
}
让我郁闷不以的是:::它并没有在radio添加Onclick事件,查看HTML源代码,差点没把我气死:原来它生成了一个Table,而这个RadioButtonList就是这个Table,而里面的Radio就是行与列了。
{
RadioButtonList m_obj = sender as RadioButtonList;
m_obj.Attributes.Add("onclick","alert()");
}
<table id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType" class="s_verdana" onclick="alert()" border="0" style="440px;">
<tr>
<td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_0" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="0" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_0">All</label></td><td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_1" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="1" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_1">All Client</label></td><td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_2" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="2" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_2">All Users</label></td><td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_3" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="3" checked="checked" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_3">Sperical</label></td>
</tr>
</table>
这也算了,如果非要这样用也行,可以在它的子控件里再添加事件,这样可是麻烦多了。看看CheckBoxList,原理也一样,也就不多说了。<tr>
<td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_0" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="0" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_0">All</label></td><td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_1" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="1" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_1">All Client</label></td><td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_2" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="2" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_2">All Users</label></td><td><input id="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_3" type="radio" name="Inc_Admin_MsgManager1:Inc_WAVE_Messages1:RadioButtonList_MsgType" value="3" checked="checked" /><label for="Inc_Admin_MsgManager1_Inc_WAVE_Messages1_RadioButtonList_MsgType_3">Sperical</label></td>
</tr>
</table>
回到DataList上来,看它如果用CheckBox来取回数据吧,先把所有的子控件都列出来:
private void AddMessageRelations()
{
if(this.RadioButtonList_MsgType.SelectedIndex<3) return;
CheckBox m_checkBox;
for(int i=0;i<this.DataList1.Items.Count;i++)
{
// m_checkBox = this.DataList1.Items[i].Controls[0] as CheckBox;
// if(m_checkBox.Checked)
// {
// Response.Write(m_checkBox.Text);
// }
Response.Write("i="+i.ToString()+":"+this.DataList1.Items[i].ToString()+"<br/>");
for(int j=0;j<this.DataList1.Items[i].Controls.Count;j++)
{
Response.Write("j="+j.ToString()+":"+ this.DataList1.Items[i].Controls[j].ToString()+"<br/>");
}
Response.Write("<br>==================================<br>");
}
}
看看结果:{
if(this.RadioButtonList_MsgType.SelectedIndex<3) return;
CheckBox m_checkBox;
for(int i=0;i<this.DataList1.Items.Count;i++)
{
// m_checkBox = this.DataList1.Items[i].Controls[0] as CheckBox;
// if(m_checkBox.Checked)
// {
// Response.Write(m_checkBox.Text);
// }
Response.Write("i="+i.ToString()+":"+this.DataList1.Items[i].ToString()+"<br/>");
for(int j=0;j<this.DataList1.Items[i].Controls.Count;j++)
{
Response.Write("j="+j.ToString()+":"+ this.DataList1.Items[i].Controls[j].ToString()+"<br/>");
}
Response.Write("<br>==================================<br>");
}
}
好了,清楚是怎么回事了就好办了。以下代码取得用户选定CheckBox的ID值。
private void AddMessageRelations()
{
if(this.RadioButtonList_MsgType.SelectedIndex<3) return;
CheckBox m_checkBox;
for(int i=0;i<this.DataList1.Items.Count;i++)
{
m_checkBox = this.DataList1.Items[i].Controls[1] as CheckBox;
if(m_checkBox.Checked)
{
Response.Write(this.DataList1.DataKeys[i].ToString()+":"+m_checkBox.Text+"<br>");
}
// Response.Write("i="+i.ToString()+":"+this.DataList1.Items[i].ToString()+"<br/>");
// for(int j=0;j<this.DataList1.Items[i].Controls.Count;j++)
// {
// Response.Write("j="+j.ToString()+":"+ this.DataList1.Items[i].Controls[j].ToString()+"<br/>");
// }
// Response.Write("<br>==================================<br>");
}
}
{
if(this.RadioButtonList_MsgType.SelectedIndex<3) return;
CheckBox m_checkBox;
for(int i=0;i<this.DataList1.Items.Count;i++)
{
m_checkBox = this.DataList1.Items[i].Controls[1] as CheckBox;
if(m_checkBox.Checked)
{
Response.Write(this.DataList1.DataKeys[i].ToString()+":"+m_checkBox.Text+"<br>");
}
// Response.Write("i="+i.ToString()+":"+this.DataList1.Items[i].ToString()+"<br/>");
// for(int j=0;j<this.DataList1.Items[i].Controls.Count;j++)
// {
// Response.Write("j="+j.ToString()+":"+ this.DataList1.Items[i].Controls[j].ToString()+"<br/>");
// }
// Response.Write("<br>==================================<br>");
}
}