![alt text http://[url=http://www.freeimagehosting.net/][img]http://www.freeimagehosting.net/uploads/06e679a07d.jpg[/img][/url]](http://[url=http://www.freeimagehosting.net/][img]http://www.freeimagehosting.net/uploads/06e679a07d.jpg[/img][/url]){kind=link}
如何将按钮更改为图像按钮...开头的按钮有一个“选择日期”，当点击一个日历弹出时，当选择日期时，底部的标签读取日期进来和文本上的按钮更改为禁用...我想找到一个图像按钮，具有日历的图像图标，其余的功能将是相同的....
代码如下：
使用系统;使用System.Collections.Generic;使用System.ComponentModel;使用System.Text;使用System.Web;使用System.Web.UI;使用System.Web.UI.WebControls;
[assembly：TagPrefix（“DatePicker”，“EWS”）]命名空间EclipseWebSolutions.DatePicker {[DefaultProperty（“Text”）] [ToolboxData（“<{0}：DatePicker runat = server>”）] [DefaultEvent（“SelectionChanged”） ）] [ValidationProperty（“TextValue”）]公共类DatePicker：WebControl，INamingContainer {#region Properties
public TextBox txtDate = new TextBox();
public Calendar calDate = new Calendar();
public Button btnDate = new Button();
public Panel pnlCalendar = new Panel();
private enum ViewStateConstants
{
ValidationGroup,
RegularExpression,
ErrorMessage,
RegExText,
CalendarPosition,
FormatString,
ExpandLabel,
CollapseLabel,
ApplyDefaultStyle,
CausesValidation,
}
/// <summary>
/// Defines the available display modes of this calendar.
/// </summary>
public enum CalendarDisplay
{
DisplayRight,
DisplayBelow
}
/// <summary>
/// Where to display the popup calendar.
/// </summary>
[Category("Behaviour")]
[Localizable(true)]
public CalendarDisplay CalendarPosition
{
get
{
if (ViewState[ViewStateConstants.CalendarPosition.ToString()] == null)
{
ViewState[ViewStateConstants.CalendarPosition.ToString()] = CalendarDisplay.DisplayRight;
}
return (CalendarDisplay)ViewState[ViewStateConstants.CalendarPosition.ToString()];
}
set
{
ViewState[ViewStateConstants.CalendarPosition.ToString()] = value;
}
}
/// <summary>
/// Text version of the control's value, for use by ASP.NET validators.
/// </summary>
public string TextValue
{
get { return txtDate.Text; }
}
/// <summary>
/// Holds the current date value of this control.
/// </summary>
[Category("Behaviour")]
[Localizable(true)]
[Bindable(true, BindingDirection.TwoWay)]
public DateTime DateValue
{
get
{
try
{
if (txtDate.Text == "") return DateTime.MinValue;
DateTime val = DateTime.Parse(txtDate.Text);
return val;
}
catch (ArgumentNullException)
{
return DateTime.MinValue;
}
catch (FormatException)
{
return DateTime.MinValue;
}
}
set
{
if (value == DateTime.MinValue)
{
txtDate.Text = "";
}
else
{
txtDate.Text = value.ToShortDateString();
}
}
}
[Category("Behavior"), Themeable(false), DefaultValue("")]
public virtual string ValidationGroup
{
get
{
if (ViewState[ViewStateConstants.ValidationGroup.ToString()] == null)
{
return string.Empty;
}
else
{
return (string)ViewState[ViewStateConstants.ValidationGroup.ToString()];
}
}
set
{
ViewState[ViewStateConstants.ValidationGroup.ToString()] = value;
}
}
/// <summary>
/// The label of the exand button. Shown when the calendar is hidden.
/// </summary>
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("PickDate")]
[Localizable(true)]
public string ExpandButtonLabel
{
get
{
String s = (String)ViewState[ViewStateConstants.ExpandLabel.ToString()];
return ((s == null) ? "PickDate" : s);
}
set
{
ViewState[ViewStateConstants.ExpandLabel.ToString()] = value;
}
}
/// <summary>
/// The label of the collapse button. Shown when the calendar is visible.
/// </summary>
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("Disabled")]
[Localizable(true)]
public string CollapseButtonLabel
{
get
{
String s = (String)ViewState[ViewStateConstants.CollapseLabel.ToString()];
return ((s == null) ? "Disabled" : s);
}
set
{
ViewState[ViewStateConstants.CollapseLabel.ToString()] = value;
}
}
/// <summary>
/// Whether to apply the default style. Disable this if you want to apply a custom style, or to use themes and skins
/// to style the control.
/// </summary>
[Category("Appearance")]
[DefaultValue(true)]
[Localizable(true)]
public bool ApplyDefaultStyle
{
get
{
if (ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()] == null)
{
ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()] = true;
}
return (bool)ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()];
}
set
{
ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()] = value;
}
}
/// <summary>
/// Causes Validation
/// </summary>
[Category("Appearance")]
[DefaultValue(false)]
[Localizable(false)]
public bool CausesValidation
{
get
{
if (ViewState[ViewStateConstants.CausesValidation.ToString()] == null)
{
ViewState[ViewStateConstants.CausesValidation.ToString()] = false;
}
return (bool)ViewState[ViewStateConstants.CausesValidation.ToString()];
}
set
{
ViewState[ViewStateConstants.CausesValidation.ToString()] = value;
btnDate.CausesValidation = value;
}
}
#endregion
#region Events
/// <summary>
/// A day was selected from the calendar control.
/// </summary>
public event EventHandler SelectionChanged;
protected virtual void OnSelectionChanged()
{
if (SelectionChanged != null) // only raise the event if someone is listening.
{
SelectionChanged(this, EventArgs.Empty);
}
}
#endregion
#region Event Handlers
/// <summary>
/// The +/- button was clicked.
/// </summary>
protected void btnDate_Click(object sender, System.EventArgs e)
{
if (!calDate.Visible)
{
// expand the calendar
calDate.Visible = true;
txtDate.Enabled = false;
btnDate.Text = CollapseButtonLabel;
if (DateValue != DateTime.MinValue)
{
calDate.SelectedDate = DateValue;
calDate.VisibleDate = DateValue;
}
}
else
{
// collapse the calendar
calDate.Visible = false;
txtDate.Enabled = true;
btnDate.Text = ExpandButtonLabel;
}
}
/// <summary>
/// A date was selected from the calendar.
/// </summary>
protected void calDate_SelectionChanged(object sender, System.EventArgs e)
{
calDate.Visible = false;
txtDate.Visible = true;
btnDate.Text = ExpandButtonLabel;
txtDate.Enabled = true;
txtDate.Text = calDate.SelectedDate.ToShortDateString();
OnSelectionChanged();
}
#endregion
/// <summary>
/// Builds the contents of this control.
/// </summary>
protected override void CreateChildControls()
{
btnDate.Text = ExpandButtonLabel;
btnDate.CausesValidation = CausesValidation;
txtDate.ID = "txtDate";
calDate.Visible = false;
if (ApplyDefaultStyle)
{
calDate.BackColor = System.Drawing.Color.White;
calDate.BorderColor = System.Drawing.Color.FromArgb(10066329);
calDate.CellPadding = 2;
calDate.DayNameFormat = DayNameFormat.Shortest;
calDate.Font.Name = "Verdana";
calDate.Font.Size = FontUnit.Parse("8pt");
calDate.ForeColor = System.Drawing.Color.Black;
calDate.Height = new Unit(150, UnitType.Pixel);
calDate.Width = new Unit(180, UnitType.Pixel);
calDate.DayHeaderStyle.BackColor = System.Drawing.Color.FromArgb(228, 228, 228);
calDate.DayHeaderStyle.Font.Size = FontUnit.Parse("7pt");
calDate.TitleStyle.Font.Bold = true;
calDate.WeekendDayStyle.BackColor = System.Drawing.Color.FromArgb(255, 255, 204);
}
ConnectEventHandlers();
pnlCalendar.Controls.Add(calDate);
pnlCalendar.Style["position"] = "absolute";
pnlCalendar.Style["filter"] = "alpha(opacity=95)";
pnlCalendar.Style["-moz-opacity"] = ".95";
pnlCalendar.Style["opacity"] = ".95";
pnlCalendar.Style["z-index"] = "2";
pnlCalendar.Style["background-color"] = "White";
if (CalendarPosition == CalendarDisplay.DisplayBelow)
{
pnlCalendar.Style["margin-top"] = "27px";
}
else
{
pnlCalendar.Style["display"] = "inline";
}
Controls.Add(txtDate);
Controls.Add(pnlCalendar);
Controls.Add(btnDate);
base.CreateChildControls();
}
/// <summary>
/// Render the contents of this control.
/// </summary>
/// <param name="output">The HtmlTextWriter to use.</param>
protected override void RenderContents(HtmlTextWriter output)
{
switch (CalendarPosition)
{
case CalendarDisplay.DisplayRight:
{
txtDate.RenderControl(output);
btnDate.RenderControl(output);
pnlCalendar.RenderControl(output);
break;
}
case CalendarDisplay.DisplayBelow:
{
pnlCalendar.RenderControl(output);
txtDate.RenderControl(output);
btnDate.RenderControl(output);
break;
}
}
}
/// <summary>
/// Connect event handlers to events.
/// </summary>
private void ConnectEventHandlers()
{
btnDate.Click += new System.EventHandler(btnDate_Click);
calDate.SelectionChanged += new System.EventHandler(calDate_SelectionChanged);
}
}
}
使用系统;使用System.Collections.Generic;使用System.ComponentModel;使用System.Text;使用System.Web;使用System.Web.UI;使用System.Web.UI.WebControls;
[assembly：TagPrefix（“DatePicker”，“EWS”）]命名空间EclipseWebSolutions.DatePicker {[DefaultProperty（“Text”）] [ToolboxData（“<{0}：DatePicker runat = server>”）] [DefaultEvent（“SelectionChanged”） ）] [ValidationProperty（“TextValue”）]公共类DatePicker：WebControl，INamingContainer {#region Properties
public TextBox txtDate = new TextBox();
public Calendar calDate = new Calendar();
public Button btnDate = new Button();
public Panel pnlCalendar = new Panel();
private enum ViewStateConstants
{
ValidationGroup,
RegularExpression,
ErrorMessage,
RegExText,
CalendarPosition,
FormatString,
ExpandLabel,
CollapseLabel,
ApplyDefaultStyle,
CausesValidation,
}
/// <summary>
/// Defines the available display modes of this calendar.
/// </summary>
public enum CalendarDisplay
{
DisplayRight,
DisplayBelow
}
/// <summary>
/// Where to display the popup calendar.
/// </summary>
[Category("Behaviour")]
[Localizable(true)]
public CalendarDisplay CalendarPosition
{
get
{
if (ViewState[ViewStateConstants.CalendarPosition.ToString()] == null)
{
ViewState[ViewStateConstants.CalendarPosition.ToString()] = CalendarDisplay.DisplayRight;
}
return (CalendarDisplay)ViewState[ViewStateConstants.CalendarPosition.ToString()];
}
set
{
ViewState[ViewStateConstants.CalendarPosition.ToString()] = value;
}
}
/// <summary>
/// Text version of the control's value, for use by ASP.NET validators.
/// </summary>
public string TextValue
{
get { return txtDate.Text; }
}
/// <summary>
/// Holds the current date value of this control.
/// </summary>
[Category("Behaviour")]
[Localizable(true)]
[Bindable(true, BindingDirection.TwoWay)]
public DateTime DateValue
{
get
{
try
{
if (txtDate.Text == "") return DateTime.MinValue;
DateTime val = DateTime.Parse(txtDate.Text);
return val;
}
catch (ArgumentNullException)
{
return DateTime.MinValue;
}
catch (FormatException)
{
return DateTime.MinValue;
}
}
set
{
if (value == DateTime.MinValue)
{
txtDate.Text = "";
}
else
{
txtDate.Text = value.ToShortDateString();
}
}
}
[Category("Behavior"), Themeable(false), DefaultValue("")]
public virtual string ValidationGroup
{
get
{
if (ViewState[ViewStateConstants.ValidationGroup.ToString()] == null)
{
return string.Empty;
}
else
{
return (string)ViewState[ViewStateConstants.ValidationGroup.ToString()];
}
}
set
{
ViewState[ViewStateConstants.ValidationGroup.ToString()] = value;
}
}
/// <summary>
/// The label of the exand button. Shown when the calendar is hidden.
/// </summary>
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("PickDate")]
[Localizable(true)]
public string ExpandButtonLabel
{
get
{
String s = (String)ViewState[ViewStateConstants.ExpandLabel.ToString()];
return ((s == null) ? "PickDate" : s);
}
set
{
ViewState[ViewStateConstants.ExpandLabel.ToString()] = value;
}
}
/// <summary>
/// The label of the collapse button. Shown when the calendar is visible.
/// </summary>
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("Disabled")]
[Localizable(true)]
public string CollapseButtonLabel
{
get
{
String s = (String)ViewState[ViewStateConstants.CollapseLabel.ToString()];
return ((s == null) ? "Disabled" : s);
}
set
{
ViewState[ViewStateConstants.CollapseLabel.ToString()] = value;
}
}
/// <summary>
/// Whether to apply the default style. Disable this if you want to apply a custom style, or to use themes and skins
/// to style the control.
/// </summary>
[Category("Appearance")]
[DefaultValue(true)]
[Localizable(true)]
public bool ApplyDefaultStyle
{
get
{
if (ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()] == null)
{
ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()] = true;
}
return (bool)ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()];
}
set
{
ViewState[ViewStateConstants.ApplyDefaultStyle.ToString()] = value;
}
}
/// <summary>
/// Causes Validation
/// </summary>
[Category("Appearance")]
[DefaultValue(false)]
[Localizable(false)]
public bool CausesValidation
{
get
{
if (ViewState[ViewStateConstants.CausesValidation.ToString()] == null)
{
ViewState[ViewStateConstants.CausesValidation.ToString()] = false;
}
return (bool)ViewState[ViewStateConstants.CausesValidation.ToString()];
}
set
{
ViewState[ViewStateConstants.CausesValidation.ToString()] = value;
btnDate.CausesValidation = value;
}
}
#endregion
#region Events
/// <summary>
/// A day was selected from the calendar control.
/// </summary>
public event EventHandler SelectionChanged;
protected virtual void OnSelectionChanged()
{
if (SelectionChanged != null) // only raise the event if someone is listening.
{
SelectionChanged(this, EventArgs.Empty);
}
}
#endregion
#region Event Handlers
/// <summary>
/// The +/- button was clicked.
/// </summary>
protected void btnDate_Click(object sender, System.EventArgs e)
{
if (!calDate.Visible)
{
// expand the calendar
calDate.Visible = true;
txtDate.Enabled = false;
btnDate.Text = CollapseButtonLabel;
if (DateValue != DateTime.MinValue)
{
calDate.SelectedDate = DateValue;
calDate.VisibleDate = DateValue;
}
}
else
{
// collapse the calendar
calDate.Visible = false;
txtDate.Enabled = true;
btnDate.Text = ExpandButtonLabel;
}
}
/// <summary>
/// A date was selected from the calendar.
/// </summary>
protected void calDate_SelectionChanged(object sender, System.EventArgs e)
{
calDate.Visible = false;
txtDate.Visible = true;
btnDate.Text = ExpandButtonLabel;
txtDate.Enabled = true;
txtDate.Text = calDate.SelectedDate.ToShortDateString();
OnSelectionChanged();
}
#endregion
/// <summary>
/// Builds the contents of this control.
/// </summary>
protected override void CreateChildControls()
{
btnDate.Text = ExpandButtonLabel;
btnDate.CausesValidation = CausesValidation;
txtDate.ID = "txtDate";
calDate.Visible = false;
if (ApplyDefaultStyle)
{
calDate.BackColor = System.Drawing.Color.White;
calDate.BorderColor = System.Drawing.Color.FromArgb(10066329);
calDate.CellPadding = 2;
calDate.DayNameFormat = DayNameFormat.Shortest;
calDate.Font.Name = "Verdana";
calDate.Font.Size = FontUnit.Parse("8pt");
calDate.ForeColor = System.Drawing.Color.Black;
calDate.Height = new Unit(150, UnitType.Pixel);
calDate.Width = new Unit(180, UnitType.Pixel);
calDate.DayHeaderStyle.BackColor = System.Drawing.Color.FromArgb(228, 228, 228);
calDate.DayHeaderStyle.Font.Size = FontUnit.Parse("7pt");
calDate.TitleStyle.Font.Bold = true;
calDate.WeekendDayStyle.BackColor = System.Drawing.Color.FromArgb(255, 255, 204);
}
ConnectEventHandlers();
pnlCalendar.Controls.Add(calDate);
pnlCalendar.Style["position"] = "absolute";
pnlCalendar.Style["filter"] = "alpha(opacity=95)";
pnlCalendar.Style["-moz-opacity"] = ".95";
pnlCalendar.Style["opacity"] = ".95";
pnlCalendar.Style["z-index"] = "2";
pnlCalendar.Style["background-color"] = "White";
if (CalendarPosition == CalendarDisplay.DisplayBelow)
{
pnlCalendar.Style["margin-top"] = "27px";
}
else
{
pnlCalendar.Style["display"] = "inline";
}
Controls.Add(txtDate);
Controls.Add(pnlCalendar);
Controls.Add(btnDate);
base.CreateChildControls();
}
/// <summary>
/// Render the contents of this control.
/// </summary>
/// <param name="output">The HtmlTextWriter to use.</param>
protected override void RenderContents(HtmlTextWriter output)
{
switch (CalendarPosition)
{
case CalendarDisplay.DisplayRight:
{
txtDate.RenderControl(output);
btnDate.RenderControl(output);
pnlCalendar.RenderControl(output);
break;
}
case CalendarDisplay.DisplayBelow:
{
pnlCalendar.RenderControl(output);
txtDate.RenderControl(output);
btnDate.RenderControl(output);
break;
}
}
}
/// <summary>
/// Connect event handlers to events.
/// </summary>
private void ConnectEventHandlers()
{
btnDate.Click += new System.EventHandler(btnDate_Click);
calDate.SelectionChanged += new System.EventHandler(calDate_SelectionChanged);
}
}
}
Untitled Page
使用系统;使用System.Data;使用System.Configuration;使用System.Web;使用System.Web.Security;使用System.Web.UI;使用System.Web.UI.WebControls;使用System.Web.UI.WebControls.WebParts;使用System.Web.UI.HtmlControls;
public partial class _Default：System.Web.UI.Page {protected void Page_Load（object sender，EventArgs e）{
}
protected void DatePicker1_SelectionChanged(object sender, EventArgs e)
{
Label1.Text = DatePicker1.DateValue.ToShortDateString();
pnlLabel.Update();
}
}
2 回答
要使按钮成为图像，您可以将其设置为添加背景图像 .
在Html中，图像按钮的
type属性为'image'，src属性用于确定要显示的图像 . 因此，要将标准按钮更改为image按钮，您将：EDIT 如果您尝试更改单击事件中的按钮类型，则可能需要通过javascript客户端执行此操作 . 你可以通过在Click事件中注册一个启动脚本来做到这一点，如下所示：
问题是这只会在点击按钮触发回发后立即生效 . 它不会存在多个回发 . 为此，您需要在隐藏文本字段中存储标记或
ViewState，指示按钮应该是哪种类型，然后根据该标记确定是否需要注册此启动脚本 .