如何在asp.net中对listBox 用 optgroup 分组

yonger222 2007-12-18 05:13:32

如何在asp.net中对listBox 用 optgroup 分组
分多个组

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「已注销」 2012-04-12

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用HTML 输出..



            #region HTML输出

                string sql = "select * from Dictionaries where type=5 and ParentID=0";//父级类别

               DataTable 类别 = SQLHelper.ExecuteDataTable(CommandType.Text, sql, new DataSet(), "s", null);

                L类别.Text += "<select   id=select name='filter' onchange=quzhi(); >   ";

                L类别.Text += "<option   value='0'>请选择</option> ";

                foreach (DataRow row in 类别.Rows)

                {

                    sql = "select  * from Dictionaries where ParentID=" + row[0].ToString();//子集类别

                    DataTable 子项 = SQLHelper.ExecuteDataTable(CommandType.Text, sql, new DataSet(), "s", null);

                    if (子项.Rows.Count > 0)//存在子集就添加子集

                    {

                        L类别.Text += " <optgroup   label='--------------------- '>   </optgroup>     ";

                        L类别.Text += " <optgroup   label=" + row[1].ToString() + ">   ";

                        foreach (DataRow item in 子项.Rows)

                        {

                            L类别.Text += "   <option   value=" + item[0].ToString() + " >" + item[1].ToString() + "</option>    ";

                        }

                        L类别.Text += "  </optgroup>   ";

                        L类别.Text += " <optgroup   label=' '>   </optgroup>     ";

                    }

                    else

                    {

                        L类别.Text += "  <option   value=" + row[0].ToString() + ">" + row[1].ToString() + "</option>   ";

                    }

                }

                L类别.Text += "</select>     ";

                #endregion

用JS获取选中的值赋值给隐藏域



   $("#hide").val($("#select").val());

IT-Style 2012-04-12

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用扩展控件SmartDropDownList
http://www.cnblogs.com/webabcd/archive/2008/01/03/1024977.html
http://www.cnblogs.com/chenying99/archive/2012/02/23/2365448.html

随智阔 2011-10-14

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http://www.cnblogs.com/webabcd/archive/2008/01/03/1024977.html

lovehongyun 2008-03-05

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using System;

using System.Collections.Generic;

using System.Text;



using System.ComponentModel;

using System.Web.UI;



namespace YYControls

{

    /// <summary>

    /// SmartListBox类的属性部分

    /// </summary>

    public partial class SmartListBox

    {

        /// <summary>

        /// 用于添加SmartListBox的分组项的ListItem的Value值

        /// </summary>

        [

        Browsable(true),

        Description("用于添加ListBox的分组项的ListItem的Value值"),

        Category("扩展")

        ]

        public virtual string OptionGroupValue

        {

            get

            {

                string s = (string)ViewState["OptionGroupValue"];



                return (s == null) ? "optgroup" : s;

            }

            set

            {

                ViewState["OptionGroupValue"] = value;

            }

        }

    }

}

lovehongyun 2008-03-05

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using System;

using System.Collections.Generic;

using System.Text;



using System.Data;

using System.Web.UI.WebControls;

using System.Web.UI;

using System.Web;



namespace YYControls

{

    /// <summary>

    /// SmartListBox类的属性部分

    /// </summary>

    public partial class SmartListBox

    {

        /// <summary>

        /// 呈现Option或OptionGroup

        /// </summary>

        /// <param name="writer">writer</param>

        private void OptionGroupRenderContents(HtmlTextWriter writer)

        {

            // 是否需要呈现OptionGroup的EndTag

            bool writerEndTag = false;



            foreach (ListItem li in this.Items)

            {

                // 如果没有optgroup属性则呈现Option

                if (li.Value != this.OptionGroupValue)

                {

                    // 呈现Option

                    RenderListItem(li, writer);

                }

                // 如果有optgroup属性则呈现OptionGroup

                else

                {

                    if (writerEndTag)

                        // 呈现OptionGroup的EndTag

                        OptionGroupEndTag(writer);

                    else

                        writerEndTag = true;



                    // 呈现OptionGroup的BeginTag

                    OptionGroupBeginTag(li, writer);

                }

            }



            if (writerEndTag)

                // 呈现OptionGroup的EndTag

                OptionGroupEndTag(writer);

        }



        /// <summary>

        /// 呈现OptionGroup的BeginTag

        /// </summary>

        /// <param name="li">OptionGroup数据项</param>

        /// <param name="writer">writer</param>

        private void OptionGroupBeginTag(ListItem li, HtmlTextWriter writer)

        {

            writer.WriteBeginTag("optgroup");



            // 写入OptionGroup的label

            writer.WriteAttribute("label", li.Text);



            foreach (string key in li.Attributes.Keys)

            {

                // 写入OptionGroup的其它属性

                writer.WriteAttribute(key, li.Attributes[key]);

            }



            writer.Write(HtmlTextWriter.TagRightChar);

            writer.WriteLine();

        }



        /// <summary>

        /// 呈现OptionGroup的EndTag

        /// </summary>

        /// <param name="writer">writer</param>

        private void OptionGroupEndTag(HtmlTextWriter writer)

        {

            writer.WriteEndTag("optgroup");

            writer.WriteLine();

        }



        /// <summary>

        /// 呈现Option

        /// </summary>

        /// <param name="li">Option数据项</param>

        /// <param name="writer">writer</param>

        private void RenderListItem(ListItem li, HtmlTextWriter writer)

        {

            writer.WriteBeginTag("option");



            // 写入Option的Value

            writer.WriteAttribute("value", li.Value, true);



            if (li.Selected)

            {

                // 如果该Option被选中则写入selected

                writer.WriteAttribute("selected", "selected", false);

            }



            foreach (string key in li.Attributes.Keys)

            {

                // 写入Option的其它属性

                writer.WriteAttribute(key, li.Attributes[key]);

            }



            writer.Write(HtmlTextWriter.TagRightChar);



            // 写入Option的Text

            HttpUtility.HtmlEncode(li.Text, writer);



            writer.WriteEndTag("option");

            writer.WriteLine();

        }

    }

}

lovehongyun 2008-03-05

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using System;

using System.Collections.Generic;

using System.Text;



using System.Web.UI.WebControls;

using System.Web.UI;



[assembly: System.Web.UI.WebResource("YYControls.SmartListBox.Resources.Icon.bmp", "image/bmp")]



namespace YYControls

{

    /// <summary>

    /// SmartListBox类，继承自ListBox

    /// </summary>

    [ToolboxData(@"<{0}:SmartListBox runat='server'></{0}:SmartListBox>")]

    [System.Drawing.ToolboxBitmap(typeof(YYControls.Resources.Icon), "SmartListBox.bmp")]

    public partial class SmartListBox : ListBox

    {

        /// <summary>

        /// 构造函数

        /// </summary>

        public SmartListBox()

        {



        }



        /// <summary>

        /// 将控件的内容呈现到指定的编写器中

        /// </summary>

        /// <param name="writer">writer</param>

        protected override void RenderContents(HtmlTextWriter writer) 

        {

            // 呈现Option或OptionGroup

            OptionGroupRenderContents(writer);

        }

    }

}

lovehongyun 2008-03-05

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listbox的,代码如下:

lovehongyun 2008-03-05

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using System;

using System.Collections.Generic;

using System.Text;



using System.Web.UI.WebControls;

using System.Web.UI;



[assembly: System.Web.UI.WebResource("YYControls.SmartDropDownList.Resources.Icon.bmp", "image/bmp")]



namespace YYControls

{

    /// <summary>

    /// SmartDropDownList类，继承自DropDownList

    /// </summary>

    [ToolboxData(@"<{0}:SmartDropDownList runat='server'></{0}:SmartDropDownList>")]

    [System.Drawing.ToolboxBitmap(typeof(YYControls.Resources.Icon), "SmartDropDownList.bmp")]

    public partial class SmartDropDownList : DropDownList

    {

        /// <summary>

        /// 构造函数

        /// </summary>

        public SmartDropDownList()

        {



        }



        /// <summary>

        /// 将控件的内容呈现到指定的编写器中

        /// </summary>

        /// <param name="writer">writer</param>

        protected override void RenderContents(HtmlTextWriter writer) 

        {

            // 呈现Option或OptionGroup

            OptionGroupRenderContents(writer);

        }

    }

}

lovehongyun 2008-03-05

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using System;

using System.Collections.Generic;

using System.Text;



using System.ComponentModel;

using System.Web.UI;



namespace YYControls

{

    /// <summary>

    /// SmartDropDownList类的属性部分

    /// </summary>

    public partial class SmartDropDownList

    {

        /// <summary>

        /// 用于添加SmartDropDownList的分组项的ListItem的Value值

        /// </summary>

        [

        Browsable(true),

        Description("用于添加DropDownList的分组项的ListItem的Value值"),

        Category("扩展")

        ]

        public virtual string OptionGroupValue

        {

            get

            {

                string s = (string)ViewState["OptionGroupValue"];



                return (s == null) ? "optgroup" : s;

            }

            set

            {

                ViewState["OptionGroupValue"] = value;

            }

        }

    }

}

lovehongyun 2008-03-05

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没有这功能.得重写..

给你一个dropdownlist重写的例子,应该类似:



using System;

using System.Collections.Generic;

using System.Text;



using System.Data;

using System.Web.UI.WebControls;

using System.Web.UI;

using System.Web;



namespace YYControls

{

    /// <summary>

    /// SmartDropDownList类的属性部分

    /// </summary>

    public partial class SmartDropDownList

    {

        /// <summary>

        /// 呈现Option或OptionGroup

        /// </summary>

        /// <param name="writer">writer</param>

        private void OptionGroupRenderContents(HtmlTextWriter writer)

        {

            // 是否需要呈现OptionGroup的EndTag

            bool writerEndTag = false;



            foreach (ListItem li in this.Items)

            {

                // 如果没有optgroup属性则呈现Option

                if (li.Value != this.OptionGroupValue)

                {

                    // 呈现Option

                    RenderListItem(li, writer);

                }

                // 如果有optgroup属性则呈现OptionGroup

                else

                {

                    if (writerEndTag)

                        // 呈现OptionGroup的EndTag

                        OptionGroupEndTag(writer);

                    else

                        writerEndTag = true;



                    // 呈现OptionGroup的BeginTag

                    OptionGroupBeginTag(li, writer);

                }

            }



            if (writerEndTag)

                // 呈现OptionGroup的EndTag

                OptionGroupEndTag(writer);

        }



        /// <summary>

        /// 呈现OptionGroup的BeginTag

        /// </summary>

        /// <param name="li">OptionGroup数据项</param>

        /// <param name="writer">writer</param>

        private void OptionGroupBeginTag(ListItem li, HtmlTextWriter writer)

        {

            writer.WriteBeginTag("optgroup");

            

            // 写入OptionGroup的label

            writer.WriteAttribute("label", li.Text);



            foreach (string key in li.Attributes.Keys)

            {

                // 写入OptionGroup的其它属性

                writer.WriteAttribute(key, li.Attributes[key]);

            }



            writer.Write(HtmlTextWriter.TagRightChar);

            writer.WriteLine();

        }



        /// <summary>

        /// 呈现OptionGroup的EndTag

        /// </summary>

        /// <param name="writer">writer</param>

        private void OptionGroupEndTag(HtmlTextWriter writer)

        {

            writer.WriteEndTag("optgroup");

            writer.WriteLine();

        }



        /// <summary>

        /// 呈现Option

        /// </summary>

        /// <param name="li">Option数据项</param>

        /// <param name="writer">writer</param>

        private void RenderListItem(ListItem li, HtmlTextWriter writer)

        {

            writer.WriteBeginTag("option");



            // 写入Option的Value

            writer.WriteAttribute("value", li.Value, true);



            if (li.Selected)

            {

                // 如果该Option被选中则写入selected

                writer.WriteAttribute("selected", "selected", false);

            }



            foreach (string key in li.Attributes.Keys)

            {

                // 写入Option的其它属性

                writer.WriteAttribute(key, li.Attributes[key]);

            }



            writer.Write(HtmlTextWriter.TagRightChar);



            // 写入Option的Text

            HttpUtility.HtmlEncode(li.Text, writer);



            writer.WriteEndTag("option");

            writer.WriteLine();

        }

    }

}