学步园

功能简介：最近在做个凭证单子，里面的一些编辑框是需要联想功能的。
功能实现：在AJAX功能的吸引下，我GOOGLE到了MS开发的ASP.NET 2.0 AJAX Extensions 1.0是基于.NET FRAMEWORK 2.0开发的，正合我意，下面利用AutoCompleteExtender控件来实现我需要的功能
部分主要代码如下：
HTML界面代码

    <cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
    </cc1:ToolkitScriptManager>
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        &nbsp;&nbsp;
        <cc1:AutoCompleteExtender ID="AutoCompleteExtender1" MinimumPrefixLength="1" 
                CompletionInterval="300"
                EnableCaching="true"
                CompletionSetCount="10"
 BehaviorID="AutoCompleteEx" runat="server" ServiceMethod="GetCompletionList"
            UseContextKey="True" TargetControlID="TextBox1">
                <Animations>
                    <OnShow>
                        <Sequence>
                            
                            <OpacityAction Opacity="0" />
                            <HideAction Visible="true" />
                            <ScriptAction Script="
                                // Cache the size and setup the initial size
                                var behavior = $find('AutoCompleteEx');
                                if (!behavior._height) {
                                    var target = behavior.get_completionList();
                                    behavior._height = target.offsetHeight - 2;
                                    target.style.height = '0px';
                                }" />
                                <Parallel Duration=".1">
                                <FadeIn />
                                <Length PropertyKey="height" StartValue="0" EndValueScript="$find('AutoCompleteEx')._height" />
                            </Parallel>
                        </Sequence>
                    </OnShow>
                    <OnHide>
                        <Parallel Duration=".1">
                            <FadeOut />
                            <Length PropertyKey="height" StartValueScript="$find('AutoCompleteEx')._height" EndValue="0" />
                        </Parallel>
                    </OnHide></Animations>
        </cc1:AutoCompleteExtender>
        <script type="text/javascript">
            // Work around browser behavior of "auto-submitting" simple forms
            var frm = document.getElementById("aspnetForm");
            if (frm) {
                frm.onsubmit = function() { return false; };
            }
        </script>
    <input type="submit" style="display:none;" />
    </div>

验证代码(CS)如下：

    public string[] GetAutoComplete(string prefixText, int count)
    {
        string xm = "";
        string fixxm = "";
        if (count == 0)
        {
            count = 10;
        }

        if (prefixText.Equals("我"))
        {
            return new string[0];
        }

        List<string> items = new List<string>(count);

        ClassLibrary.SzsData.szsDataTable sd = new ClassLibrary.SzsData.szsDataTable();
        ClassLibrary.SzsDataTableAdapters.szsTableAdapter sta = new ClassLibrary.SzsDataTableAdapters.szsTableAdapter();
        sd = sta.GetData();
        int rCount = 0;
        for (int i = 0; i < sd.Rows.Count; i++)
        {
            xm = sd.Rows[i]["姓名"].ToString();
            if (xm.Length > prefixText.Length)
            {
                fixxm = xm.Remove(prefixText.Length, xm.Length - prefixText.Length);
                if (fixxm == prefixText)
                {
                    items.Add(sd.Rows[i]["姓名"].ToString());
                    rCount++;
                    if (rCount >= 10)
                    {
                        break;
                    }
                }
            }
        }
        return items.ToArray();
    }

控件存在的BUG：如果需要返回数字类型的，结果会在编辑框下显示UNDEFINE，也许是JAVASCRIPT中的单引出现的问题，所以例如下面的方法：

    public string[] GetStringLength(string prefixText)
    {
        string[] items = new string[10];
        items[0] = prefixText.Length.ToString();
        return items;
    }

则需修改为以下：

    public string[] GetStringLength(string prefixText)
    {
        string[] items = new string[10];
        items[0] = "'"+prefixText.Length.ToString()+"'";
        return items;
    }

希望下次MS在发布该组控件同时能解决此BUG。