這篇文章主要介紹了為CheckBoxList和RadioButtonList添加滾動(dòng)條的方法,感興趣的小伙伴們可以參考一下
如何給CheckBoxList和RadioButtonList添加滾動(dòng)條?
繼承基類(lèi)CheckBoxList和RadioButtonList,添加滾動(dòng)屬性,重寫(xiě)Render方法即可。
屬性列表:
#region 滾動(dòng)控制
private bool _ShowScrollBar = false;
/// <summary>
/// 顯示滾動(dòng)條
/// </summary>
[
System.ComponentModel.Description("是否顯示顯示滾動(dòng)條")
, System.ComponentModel.DefaultValue(false)
, System.ComponentModel.Category("滾動(dòng)條設(shè)置")
, System.ComponentModel.Bindable(System.ComponentModel.BindableSupport.Yes)
]
public bool ShowScrollBar
{
get { return _ShowScrollBar; }
set { _ShowScrollBar = value; }
}
private Overflow _OverflowY = Overflow.auto;
/// <summary>
/// 豎直滾動(dòng)條
/// </summary>
[
System.ComponentModel.Description("豎直滾動(dòng)條")
, System.ComponentModel.DefaultValue(Overflow.auto)
, System.ComponentModel.Category("滾動(dòng)條設(shè)置")
, System.ComponentModel.Bindable(System.ComponentModel.BindableSupport.Yes)
]
public Overflow OverflowY
{
get { return _OverflowY; }
set { _OverflowY = value; }
}
private Overflow _OverflowX = Overflow.auto;
/// <summary>
/// 水平滾動(dòng)條
/// </summary>
[
System.ComponentModel.Description("水平滾動(dòng)條")
, System.ComponentModel.DefaultValue(Overflow.auto)
, System.ComponentModel.Category("滾動(dòng)條設(shè)置")
, System.ComponentModel.Bindable(System.ComponentModel.BindableSupport.Yes)
]
public Overflow OverflowX
{
get { return _OverflowX; }
set { _OverflowX = value; }
}
private Unit _ScrollHeight = Unit.Parse("0px");
/// <summary>
/// 滾動(dòng)高度
/// </summary>
[
System.ComponentModel.Description("滾動(dòng)高度")
, System.ComponentModel.Category("滾動(dòng)條設(shè)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>
/// 滾動(dòng)寬度
/// </summary>
[
System.ComponentModel.Description("滾動(dòng)寬度")
, System.ComponentModel.Category("滾動(dòng)條設(shè)置")
, DefaultValue("0px")
, System.ComponentModel.Bindable(System.ComponentModel.BindableSupport.Yes)
]
public Unit ScrollWidth
{
get { return _ScrollWidth; }
set { _ScrollWidth = value; }
}
private string _ScrollCssClass = "";
/// <summary>
/// 滾動(dòng)樣式設(shè)置
/// </summary>
[
System.ComponentModel.Description("滾動(dòng)樣式設(shè)置")
, System.ComponentModel.Category("滾動(dòng)條設(shè)置")
, System.ComponentModel.DefaultValue("")
, System.ComponentModel.Bindable(System.ComponentModel.BindableSupport.Yes)
]
public string ScrollCssClass
{
get { return _ScrollCssClass; }
set { _ScrollCssClass = value; }
}
#region 書(shū)寫(xiě)標(biāo)簽
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
重寫(xiě)Render方法:
protected override void Render(HtmlTextWriter writer)
{
this.WriteBeginSpan(writer);
base.Render(writer);
this.WriteEndSpan(writer);
}
就這樣就可以了。
還要定義一個(gè)枚舉:
public enum Overflow
{
auto = 0,
hidden = 1,
scroll = 2,
visible = 3,
inherit = 4
}
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助