111 lines
3.8 KiB
C#
111 lines
3.8 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="ModelErrorMessage.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.WebControls {
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using System.ComponentModel;
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using System.Linq;
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using System.Web;
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using System.Web.ModelBinding;
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/// <summary>
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/// Displays the first model error for a given key from the page's model state
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/// </summary>
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[
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ToolboxData("<{0}:ModelErrorMessage runat=\"server\" Key=\"ModelStateKey\"></{0}:ModelErrorMessage>"),
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DefaultProperty("Key"),
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ParseChildren(true),
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PersistChildren(false)
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]
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public class ModelErrorMessage : Label {
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[
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Themeable(false),
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WebCategory("Behavior"),
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WebSysDescription(SR.ModelErrorMessage_ModelStateKey),
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DefaultValue("")
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]
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public string ModelStateKey {
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get {
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object o = ViewState["ModelStateKey"];
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return ((o == null) ? String.Empty : (string)o);
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}
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set {
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ViewState["ModelStateKey"] = value;
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}
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}
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[
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DefaultValue(""),
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IDReferenceProperty,
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WebCategory("Behavior"),
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WebSysDescription(SR.ModelErrorMessage_AssociatedControlID),
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Themeable(false)
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]
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public override string AssociatedControlID {
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get {
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return base.AssociatedControlID;
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}
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set {
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base.AssociatedControlID = value;
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}
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}
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[
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WebCategory("Behavior"),
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Themeable(false),
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DefaultValue(false),
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WebSysDescription(SR.ModelErrorMessage_SetFocusOnError)
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]
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public bool SetFocusOnError {
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get {
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object o = ViewState["SetFocusOnError"];
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return ((o == null) ? false : (bool)o);
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}
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set {
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ViewState["SetFocusOnError"] = value;
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}
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}
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[
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Browsable(false),
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EditorBrowsable(EditorBrowsableState.Never),
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PersistenceMode(PersistenceMode.Attribute)
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]
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public override string Text {
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// We don't want the Text property exposed to the developer as we're going to set it
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// ourselves to the value from the model state. We don't want to store it in ViewState
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// because we want it re-evaluated on every render anyway, so storing in ViewState is
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// just overhead.
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get;
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set;
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}
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protected internal override void OnPreRender(EventArgs e) {
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base.OnPreRender(e);
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ModelState modelState;
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if (Page != null && Page.ModelState.TryGetValue(ModelStateKey, out modelState)) {
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ModelError error = modelState.Errors.FirstOrDefault(modelError => !String.IsNullOrEmpty(modelError.ErrorMessage));
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if (error != null) {
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Text = HttpUtility.HtmlEncode(error.ErrorMessage);
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// Render the script to set focus if there is a model error for the specified key
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if (SetFocusOnError) {
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var validateId = AssociatedControlID;
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if (!String.IsNullOrEmpty(validateId)) {
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var control = FindControl(validateId);
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if (control != null) {
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validateId = control.ClientID;
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}
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Page.SetValidatorInvalidControlFocus(validateId);
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}
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}
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}
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}
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}
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}
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}
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