处理在DataGrid中的DropDownList的事件

DropDownList没有CommandName属性，所以不能用ItemCommand事件，不过你可以在DataGrid的模板列中加入的DropDownList控件(aspx):

<asp:TemplateColumn HeaderText="车辆情况">
<ItemTemplate>
                  <asp:DropDownList id="carinfolist" runat="server" OnSelectedIndexChanged="carinfolist_SelectedIndexChanged"
                     AutoPostBack="True">
                       <asp:ListItem Value="1" Selected="True">正常</asp:ListItem>
    <asp:ListItem Value="0">停用</asp:ListItem>
    </asp:DropDownList>
    </ItemTemplate>
</asp:TemplateColumn>

注意:OnSelectedIndexChanged事件及AutoPostBack="True"

一、DropDownList的动态绑定，只需在DataGrid1_ItemDataBound的事件中，取出数值进行匹配.代码如下:

 

private void LiqDatagrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
        ...{
            if ((e.Item.ItemType == ListItemType.Item)||(e.Item.ItemType == ListItemType.AlternatingItem))  
            ...{
                string StrPower = e.Item.Cells[6].Text.Trim(); // 用隐藏列取出数据
                DropDownList drpcarinfo = (DropDownList)e.Item.Cells[5].FindControl("carinfolist"); 
                for(int i=0;i<drpcarinfo.Items.Count;i++)
                ...{
                    if(StrPower.Equals(drpcarinfo.Items[i].Value))
                    ...{
                        drpcarinfo.Items[i].Selected = true;
                    }
                    else
                    ...{
                        drpcarinfo.Items[i].Selected=false;
                    }
                }    
            }
        }

二、触发DataGrid中DropDownList的事件

protected void carinfolist_SelectedIndexChanged(object sender, System.EventArgs e) 
        ...{
            string droplist = ((DropDownList)sender).SelectedValue;
            DropDownList ddl = (DropDownList)sender; 
            TableCell cell = (TableCell)ddl.Parent; 
            DataGridItem item = (DataGridItem)cell.Parent; 
            new components.DBCarInfo().carInfonew_Update(Convert.ToInt32(item.Cells[4].Text),droplist);
            Response.Write("<script>alert('！');</script>");
        }