ASP.NET Repeater里有个 LinkButton 如何调用后台 带参数的方法

Posted 2023-03-22

<asp:LinkButton runat="server" ID="lbMore" OnClick="btnSave_Click" CommandArgument='<%#Eval("user_NM") %>'>加关注</asp:LinkButton>
后台
protected void btnSave_Click(object sender, EventArgs e)
RepeaterCommandEventArgs b = (RepeaterCommandEventArgs)e;
Object nm = b.CommandArgument;
addfriend(nm);

public void addfriend(Object nm)

｝

一楼思路正确，代码写的有点小问题，呵呵

添加关注：
<asp:LinkButton ID="lbMore" EnableViewState="True" runat="server" Visible="false" CommandName="More" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"绑定你要加关注的用户ID")%>'
OnClientClick="return confirm('确定要关注该好友吗?');" Style="color: Blue">[添加关注]</asp:LinkButton>
取消关注 ：
<asp:LinkButton ID="lbUnMore" EnableViewState="True" runat="server" Visible="false" CommandName="UnMore" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"绑定你要加关注的用户ID")%>'
OnClientClick="return confirm('确定要取消关注该好友吗?');" Style="color: Blue">[取消关注]</asp:LinkButton>
后台写你的操作：
protected void rpt_ItemCOmmand(object sender, RepeaterCommandEventArgs e)

switch (e.CommandName)

case "More":

//TODO:添加关注
break;

case "UnMore":
｛
//TODO:取消关注
break;
｝


最后控制两个控件的显示和隐藏：
protected void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)

if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

取到对象 如 Info
if (info != null)

(e.Item.FindControl("lbMore") as LinkButton).Visible = !info.是否已经关注;
(e.Item.FindControl("lbUnMore") as LinkButton).Visible = info.是否已经关注;



OK ，好运 参考技术A 不是添加Onclick事件哈。你需要在你的Repeater上添加OnItemCommand事件
如：<asp:Repeater OnItemCommand="rpt_ItemCommand" ...
然后为你的LinkButton添加CommandName属性 ：
<asp:LinkButton runat="server" ID="lbMore" OnClick="btnSave_Click" CommandArgument='<%#Eval("user_NM") %>' CommandName="Save">加关注</asp:LinkButton>
之后在后台
protected void rpt_ItemCOmmand(object sender, RepeaterCommandEventArgs e)

switch (e.CommandName)

case "Save":
//TODO:添加关注

break;

参考技术B 1、写一个方法带参数的
2、给Repeater添加ItemCommand事件；然后引用方法

ASP.NET Repeater 分页显示

通过创建多一个Repeater 来作为分页用

<div style="overflow: hidden; padding-bottom: 20px; text-align: center;">
                                <asp:Repeater ID="rptPaging" runat="server" OnItemCommand="rptPaging_ItemCommand">
                                    <ItemTemplate>
                                            <asp:LinkButton ID="btnPage" style="background:darkgray; border:solid 1px #666; font:8pt tahoma;" CommandName="Page" CommandArgument="<%# Container.DataItem %>" runat="server" ForeColor="White" Font-Bold="True"><%#Container.DataItem %>
                                            </asp:LinkButton>
                                   </ItemTemplate>
                                </asp:Repeater>
                           </div>

后台代码

//此属性将包含当前页码
    public int PageNumber
    {
        get
        {
            if (ViewState["PageNumber"] != null)
            {
                return Convert.ToInt32(ViewState["PageNumber"]);
            }
            else
            {
                return 0;
            }
        }
        set { ViewState["PageNumber"] = value; }
    }

//绑定记录
    public void BindList()
    {
        DataTable dt = new DataTable();

        if (am.ReadMyBrowse(uiv.UserID, out dt) > 0)
        {
            if (dt != null && dt.Rows.Count > 0)
            {
        
                PagedDataSource pgitems = new PagedDataSource();
                pgitems.DataSource = dt.DefaultView;
                pgitems.AllowPaging = true;
                
                pgitems.PageSize = 20;
                pgitems.CurrentPageIndex = PageNumber;
                if (pgitems.PageCount > 1)
                {
                    rptPaging.Visible = true;
                    ArrayList pages = new ArrayList();
                    for (int i = 0; i <= pgitems.PageCount - 1; i++)
                    {
                        pages.Add((i + 1).ToString());
                    }
                    rptPaging.DataSource = pages;
                    rptPaging.DataBind();
                }
                else
                {
                    rptPaging.Visible = false;
                }
         
                repeater1.DataSource = pgitems;
                repeater1.DataBind();
                //repeater1.DataSource = dt;
                //repeater1.DataBind();
            }
            else
            {
                repeater1.DataSource = "";
                repeater1.DataBind();
                rptPaging.DataSource = "";
                rptPaging.DataBind();
            }
        }
        else
        {
            repeater1.DataSource = "";
            repeater1.DataBind();
            rptPaging.DataSource = "";
            rptPaging.DataBind();
        }
    }

protected void rptPaging_ItemCommand(object source, System.Web.UI.WebControls.RepeaterCommandEventArgs e)
{
    PageNumber = Convert.ToInt32(e.CommandArgument) - 1;
    BindRepeater();
}

效果: