列表中数据的上下移动

aspx页面代码：

<%#(Convert.ToInt32(Eval("sortindex")) == nMaxIndex) ? "" : "<td class='wenzi'>
<a href='#' onclick=\"sortInformation(" + Eval("fid") + "," + ",'up'," + Eval("sortindex") + ")\">上移</a></td>"%>

<%#(Convert.ToInt32(Eval("sortindex")) == nMinIndex) ? "" : "<td class='wenzi'>
<a href='#' onclick=\"sortInformation(" + Eval("fid") + "," + ",'down'," + Eval("sortindex") + ")\">下移</a></td>"%>

上述三元表达式，保证当是列表中第一条数据时，没有上移链接，当是列表中最后一条数据时候，没有下移链接；

aspx.cs文件代码：

protected int nMaxIndex = FooterBLL.GetMaxIndex();  //获得最大索引
protected int nMinIndex = FooterBLL.GetMinIndex();  //获得最小索引

JS文件代码：

//上下移动
function sortInformation(keyID,optype,sortindex) {
    if (keyID <= 0) {
        alert("无效的信息ID参数，操作终止。");
        return;
    }
    if (sortindex <= 0) {
        alert("无效的索引值，操作终止。");
        return;
    }
    if (optype != ‘up’ && optype != 'down') {
        alert("无效的操作类型，操作终止。");
        return;
    }

    $.ajax({
        type: 'POST',
        url: 'UserControl/SetInfoSort.ashx',
        data: {
            KeyID: keyID,
            SortIndex: sortindex,
            OpType: optype
        },
        success: function (res) {
            if (res == 1) {
                window.location.reload();
            } else {
                alert("移动操作失败,请重试。");
            }
        },
        error: function () {
            alert("移动请求发送失败,请重试。");
        }
    });
}

ashx文件代码：

public class SetInfoSort : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";

        string strRescult = "0";   //1：成功 0：失败

        string strKeyID = context.Request.Form["KeyID"];
        int nKeyID = 0;
        if (!int.TryParse(strKeyID, out nKeyID) || nKeyID <= 0)
        {
            context.Response.Write(strRescult);
            return;
        }

        string strSortIndex = context.Request.Form["SortIndex"];
        int nSortIndex = 0;
        if (!int.TryParse(strSortIndex, out nSortIndex) || nSortIndex <= 0)
        {
            context.Response.Write(strRescult);
            return;
        }

        string strCateID = context.Request.Form["CateID"];
        int nCateID = 0;
        if (!int.TryParse(strCateID, out nCateID) || nCateID <= 0)
        {
            context.Response.Write(strRescult);
            return;
        }

        string strOpType = context.Request.Form["OpType"];　　　　 if(strOpType != "up" && strOpType != "down")
        {
            context.Response.Write(strRescult);
            return;
        } 
        

        if (InformationBLL.SetInformationSort(nKeyID,nSortIndex,nOpType))
            strRescult = "1";
        context.Response.Write(strRescult);
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

SQL存储过程：

ALTER PROCEDURE [dbo].[Footer_Sort] 
    @UPKEYID    INT, --改变排序之前，序号较大者
    @DOWNKEYID  INT, --改变排序之前，序号较小者

    @RESCULT    INT OUTPUT   --1：成功 0：失败
AS
BEGIN
    SET @RESCULT = 0

    BEGIN TRAN T
        DECLARE @TEMPUP INT
        DECLARE @TEMPDOWN INT
        SELECT @TEMPUP = SORTINDEX FROM FOOTER WHERE FID = @UPKEYID
        SELECT @TEMPDOWN = SORTINDEX FROM FOOTER WHERE FID = @DOWNKEYID

        UPDATE FOOTER SET SORTINDEX = @TEMPDOWN WHERE FID = @UPKEYID
            IF(@@ERROR <> 0)
            BEGIN
                ROLLBACK TRAN T
            END

        UPDATE FOOTER SET SORTINDEX = @TEMPUP WHERE FID = @DOWNKEYID
            IF(@@ERROR <> 0)
            BEGIN
                ROLLBACK TRAN T
            END
        SET @RESCULT = 1
    COMMIT TRAN T

END

来源：https://www.cnblogs.com/wxh19860528/archive/2013/01/11/2856526.html

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