如何为CheckBoxList和RadioButtonList添加滚动条
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2023-11-29 14:10:34
如何给checkboxlist和radiobuttonlist添加滚动条?
继承基类checkboxlist和radiobuttonlist,添加滚动属性,重写rende...
如何给checkboxlist和radiobuttonlist添加滚动条?
继承基类checkboxlist和radiobuttonlist,添加滚动属性,重写render方法即可。
属性列表:
#region 滚动控制 private bool _showscrollbar = false; /// <summary> /// 显示滚动条 /// </summary> [ system.componentmodel.description("是否显示显示滚动条") , system.componentmodel.defaultvalue(false) , system.componentmodel.category("滚动条设置") , system.componentmodel.bindable(system.componentmodel.bindablesupport.yes) ] public bool showscrollbar { get { return _showscrollbar; } set { _showscrollbar = value; } } private overflow _overflowy = overflow.auto; /// <summary> /// 竖直滚动条 /// </summary> [ system.componentmodel.description("竖直滚动条") , system.componentmodel.defaultvalue(overflow.auto) , system.componentmodel.category("滚动条设置") , system.componentmodel.bindable(system.componentmodel.bindablesupport.yes) ] public overflow overflowy { get { return _overflowy; } set { _overflowy = value; } } private overflow _overflowx = overflow.auto; /// <summary> /// 水平滚动条 /// </summary> [ system.componentmodel.description("水平滚动条") , system.componentmodel.defaultvalue(overflow.auto) , system.componentmodel.category("滚动条设置") , system.componentmodel.bindable(system.componentmodel.bindablesupport.yes) ] public overflow overflowx { get { return _overflowx; } set { _overflowx = value; } } private unit _scrollheight = unit.parse("0px"); /// <summary> /// 滚动高度 /// </summary> [ system.componentmodel.description("滚动高度") , system.componentmodel.category("滚动条设置") , defaultvalue("0px") , system.componentmodel.bindable(system.componentmodel.bindablesupport.yes) ] public unit scrollheight { get { return _scrollheight; } set { _scrollheight = value; } } private unit _scrollwidth = unit.parse("0px"); /// <summary> /// 滚动宽度 /// </summary> [ system.componentmodel.description("滚动宽度") , system.componentmodel.category("滚动条设置") , defaultvalue("0px") , system.componentmodel.bindable(system.componentmodel.bindablesupport.yes) ] public unit scrollwidth { get { return _scrollwidth; } set { _scrollwidth = value; } } private string _scrollcssclass = ""; /// <summary> /// 滚动样式设置 /// </summary> [ system.componentmodel.description("滚动样式设置") , system.componentmodel.category("滚动条设置") , system.componentmodel.defaultvalue("") , system.componentmodel.bindable(system.componentmodel.bindablesupport.yes) ] public string scrollcssclass { get { return _scrollcssclass; } set { _scrollcssclass = value; } } #region 书写标签 void writebeginspan(htmltextwriter writer) { if (this._showscrollbar) { stringbuilder strspan = new stringbuilder(); strspan.append("<span "); strspan.append(string.format("style='overflow-y:{0};overflow-x:{1};", system.enum.getname(typeof(overflow), this._overflowy), system.enum.getname(typeof(overflow), this._overflowx))); if (this._scrollheight.tostring() != "0px") { strspan.append(string.format("height:{0};", this._scrollheight)); } if (this._scrollwidth.tostring() != "0px") { strspan.append(string.format("width:{0};", this._scrollwidth)); } strspan.append("';"); if (!string.isnullorempty(_scrollcssclass)) { strspan.append(string.format(" class='{0}'", _scrollcssclass)); } strspan.append(">"); writer.write(strspan.tostring()); } } void writeendspan(htmltextwriter writer) { if (this._showscrollbar) { writer.write("</span>"); } } #endregion #endregion
重写render方法:
protected override void render(htmltextwriter writer) { this.writebeginspan(writer); base.render(writer); this.writeendspan(writer); }
就这样就可以了。
还要定义一个枚举:
public enum overflow { auto = 0, hidden = 1, scroll = 2, visible = 3, inherit = 4 }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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