[转载]Asp.Net MVC2 控件开发实例(1) – 迈克尔二孬 – 博客园.
以HtmlHelper的形式调用:
<%=Html.MultiSelectFor(m => m.CodeMC, m => m.CodeDM, “dm_jwrylbb“,“dm<80“,“,“,500,“标题“, new { @style = “width:400px“ })%>
选择后点击确定,选择项会用分隔符拼接存入文本框,关键信息(如显示项的ID)会存入隐藏域
其中参数按顺序为:文本框ID,隐藏域ID,数据表名称,绑定的数据表过滤条件,分隔符,弹出层高度,标题,htmlAttributes。
思 路:在htmlhelper中构建文本框和隐藏域控件,文本框控件赋予onfocus事件,此事件post调用 PartialViewResult:ShowView(…),此action绑定弹出层所需model,并返回控件view并填充到弹出层中。先来 看helper:(篇幅关系不列出所有重载)
public static MvcHtmlString MultiSelectFor(this HtmlHelper helper, Expression> expressionMC, Expression> expressionDM,string tableName,string condition,string split,int height,string caption, object mcHtmlAttributes) { StringBuilder sb = new StringBuilder(); string mcString = ExpressionHelper.GetExpressionText(expressionMC); string dmString = ExpressionHelper.GetExpressionText(expressionDM); TagBuilder tag = new TagBuilder("input"); tag.Attributes.Add("type", "text"); tag.Attributes.Add("name", mcString); tag.GenerateId(mcString); object mcValue = ModelMetadata.FromLambdaExpression(expressionMC, helper.ViewData).Model; string mcValueParameter = Convert.ToString(mcValue, System.Globalization.CultureInfo.CurrentCulture); tag.MergeAttribute("value", mcValueParameter); TagBuilder tagHidden = new TagBuilder("input"); tagHidden.Attributes.Add("type", "hidden"); tagHidden.Attributes.Add("name", dmString); tagHidden.GenerateId(dmString); object dmValue = ModelMetadata.FromLambdaExpression(expressionDM, helper.ViewData).Model; string dmValueParameter = Convert.ToString(dmValue, System.Globalization.CultureInfo.CurrentCulture); tagHidden.MergeAttribute("value", dmValueParameter); RouteValueDictionary dictionary = new RouteValueDictionary(); if (mcHtmlAttributes != null) tag.MergeAttributes(new RouteValueDictionary(mcHtmlAttributes)); if (!mcHtmlAttributes.ToString().Contains("readonly")) { dictionary.Add("onfocus", GetClickEventString(mcString, dmString, tableName, condition, split, height, caption)); } tag.MergeAttributes(dictionary); sb.Append(tag.ToString(TagRenderMode.SelfClosing)); sb.Append(tagHidden.ToString(TagRenderMode.SelfClosing)); sb.Append(GetScript(mcString, dmString,height)); return MvcHtmlString.Create(sb.ToString());}
文本框点击事件:(这段折叠显示不出来)
private static string GetClickEventString(string mcName, string dmName, string tableName, string condition, string split,int height,string caption) { StringBuilder sbClick = new StringBuilder(); //sbClick.Append("setMSFloat();"); sbClick.Append("var selectorMC='#'+'" + mcName + "';if($(selectorMC).attr('readonly')==true){return;}"); sbClick.Append("$.post('/FM/MultiSelect/ShowView',{"); sbClick.Append("mc:\"" + mcName + "\",dm:\"" + dmName + "\",table:\"" + tableName + "\",condition:\"" + condition + "\",sign:\"" + split + "\",height:\"" + height + "\",mcContent:$('#" + mcName + "').val(),dmContent:$('#" + dmName + "').val()"); sbClick.Append("},function(data){"); sbClick.Append("$('#divMS').html(data);}"); sbClick.Append(");"); sbClick.Append("$('#divMS').dialog('open');"); sbClick.Append("$('#divMS').dialog({ title: '" + (string.IsNullOrEmpty(caption) ? "多选" : caption) + "' });"); return sbClick.ToString(); }
其他需要加载的脚本(主要为弹出层初始化代码,弹出层使用了JQuery.ui.dialog,具体使用可查官方文档:http://docs.JQuery.com/UI/Dialog)
private static string GetScript(string modelMCName, string modelDMName,int height) { StringBuilder script = new StringBuilder(); script.Append("<script type='text/javascript'>"); script.Append("$(function () {"); //script.Append("function setMSFloat(){"); script.Append("$('<form id=formMS name=formMS><div id=divMS></div></form>').appendTo('body');"); script.AppendFormat("initDialog('#formMS', '多选', '#divMS', {0}, 480);var s=document.getElementsByName('formMS')[1];$(s).remove();", height); //script.Append("};"); script.Append("});"); script.Append("</script>"); return script.ToString(); } }
之后是post调用的action:
#region MultiSelectController
public class MultiSelectController : Controller
{
[HttpPost()]
public PartialViewResult ShowView(string mc, string dm, string table, string condition, string sign, int height, string mcContent,string dmContent)
{
string SQL = string.Format(“select * from {0} where 0=0 {1}”, table, string.IsNullOrEmpty(condition) ? string.Empty : “and ” + condition);
System.Data.DataTable dt = ForeignerManagement.Operation.Common.Operation_Common.FillDataTable(SQL);
List
string[] mcArr = mcContent.Split(sign.ToCharArray());
string[] dmArr = dmContent.Split(sign.ToCharArray());
if ((!string.IsNullOrEmpty(mcContent)) && (mcArr.Length == dmArr.Length))
{
for (int i = 0; i < mcArr.Length; i++)
{
msDisplay.Add(new MSDisplay { MSMC = mcArr[i], MSDM = dmArr[i] });
}
}
dynamic m = new System.Dynamic.ExpandoObject();
m.CodeCollection = dt.Rows;
m.MC = mc;
m.DM = dm;
m.Sign = sign;
m.Height = height - 100;
m.ImgHeight = height / 4;
m.List = msDisplay;
return PartialView("~/Views/Shared/MultiSelect.ascx", m);
}
}
[/csharp]
注:此处使用了动态类型dynamic m = new System.Dynamic.ExpandoObject();省得还得构建一个Model
页面的html和css:
[html]
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl
-
<% if (Model.CodeCollection != null)
{
string hrefID = string.Empty;
string hrefIDSelector = string.Empty;
foreach (System.Data.DataRow dr in Model.CodeCollection as System.Data.DataRowCollection)
{
hrefID = "l_" + dr["DM"].ToString();
hrefIDSelector = "#" + hrefID;
%>
- ” style=”color:Black;”><%=dr["MC"].ToString()%>
” />
<% } } %>
” onclick=”lSelect();” />
-
<% if (Model.List.Count > 0)
- ” style=”color:Black”><%=item.MSMC%>
{
string hID = string.Empty;
string hSelector = string.Empty;
foreach (MSDisplay item in Model.List as List
{
hID = “r_” + item.MSDM;
hSelector = “#” + hID;
%>
<%=Html.Hidden("hidMC",Model.MC as string) %>
<%=Html.Hidden("hidDM",Model.DM as string) %>
<%=Html.Hidden("sign", Model.Sign as string)%>
[/html]
至此页面已经可以出来了,下面是控件里面的功能事件脚本:
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