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我正在使用 Ext.Net1.0。我正在使用组合框..当我通过一些计算从组合框中选择值时，如果值已经使用，那么我想动态显示错误消息，那么我该如何显示消息..？？

<ext:ComboBox ID="cmbClient" runat="server" Width="200"
                                FieldLabel="Client Name"
                                DisplayField="client_firstName" ValueField="clientId"
                                AllowBlank="false" BlankText="Select Client"
                                MsgTarget="Title" EmptyText="Select Client">
                                <Store>
                                     <ext:Store runat="server" ID="clientStore">           
                                        <Reader>
                                            <ext:JsonReader IDProperty="clientId">
                                                <Fields>
                                                    <ext:RecordField Name="clientId" />
                                                    <ext:RecordField Name="client_firstName"/>
                                                </Fields>
                                            </ext:JsonReader>
                                        </Reader>         
                                        <SortInfo Field="client_firstName" Direction="ASC" />
                                    </ext:Store>
                                </Store>
                                 <DirectEvents>
                                        <Select OnEvent="cmbClient_Change"></Select>
                                 </DirectEvents>
                            </ext:ComboBox>

cs页面代码

protected void cmbClient_Change(object sender, DirectEventArgs e)
        {

            int c = objapp.Count_SelectClient();
            if (c != 0)
            {
                statusbar.Show();
                this.statusbar.Text = cmbClient.SelectedItem.Text + " already having appoinment at selected time.";
                this.statusbar.Icon = Icon.Exclamation;
            }              
        }

在这里而不是在状态栏中显示错误消息我想在组合框中显示错误消息..那我该怎么办？

4

1 回答 1

1

尝试使用此示例：

<%@ Page Language="C#" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        this.Store1.DataSource = new object[]
        {
            new object[] { "AL", "Alabama", "The Heart of Dixie" },
            new object[] { "AK", "Alaska", "The Land of the Midnight Sun" },
            new object[] { "AZ", "Arizona", "The Grand Canyon State" },
            new object[] { "AR", "Arkansas", "The Natural State" },
            new object[] { "CA", "California", "The Golden State" },
            new object[] { "CO", "Colorado", "The Mountain State" },
            new object[] { "CT", "Connecticut", "The Constitution State" },
            new object[] { "DE", "Delaware", "The First State" },
            new object[] { "DC", "District of Columbia", "The Nation's Capital" },
            new object[] { "FL", "Florida", "The Sunshine State" },
            new object[] { "GA", "Georgia", "The Peach State" },
            new object[] { "HI", "Hawaii", "The Aloha State" },
            new object[] { "ID", "Idaho", "Famous Potatoes" }
        };

        this.Store1.DataBind();

    }
</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Comboboxes - Ext.NET Examples</title>
    <script runat="server">

    protected void ComboxValueChanged(object sender, DirectEventArgs e)
    {
        var comboBox = (ComboBox)sender;
        if ((string)comboBox.Value != "ID")
        {    
            ResourceManager1.RegisterClientScriptBlock("showTooltip", string.Format("showTooltip('{0}');", comboBox.ClientID));
        }
    }

    </script>

    <script type="text/javascript">
        function showTooltip(elemId) {
            var cmp = Ext.getCmp(elemId);
            var t = new Ext.ToolTip({
                html: "It works...",
                closable: true,
                title: "Error value:",
                autoHide: false
            });

            var box = cmp.getBox();

            t.showAt([box.x + box.width, box.y]);
        }
    </script>
</head>
<body>
    <form id="Form1" runat="server">
        <ext:ResourceManager ID="ResourceManager1" runat="server" />

        <ext:Store ID="Store1" runat="server">
            <Reader>
                <ext:ArrayReader>
                    <Fields>
                        <ext:RecordField Name="abbr" />
                        <ext:RecordField Name="state" />
                        <ext:RecordField Name="nick" />
                    </Fields>
                </ext:ArrayReader>
            </Reader>            
        </ext:Store>

        <ext:Button ID="Button1" runat="server" Text="Set 'IDAHO' value">
            <Listeners>
                <Click Handler="#{ComboBox1}.setValue('ID');" />
            </Listeners>
        </ext:Button>

        <h2>Not Editable:</h2>

        <ext:ComboBox 
            ID="ComboBox1" 
            runat="server" 
            StoreID="Store1" 
            Editable="false"
            DisplayField="state"
            ValueField="abbr"
            TypeAhead="true" 
            Mode="Local"
            ForceSelection="true"
            EmptyText="Select a state..."
            Resizable="true"
            SelectOnFocus="true"
            >
            <DirectEvents>
                <Change OnEvent="ComboxValueChanged"></Change>
            </DirectEvents>
        </ext:ComboBox>
    </form>
</body>
</html>
于 2012-09-04T04:38:01.130 回答