我的WEB自定义控件里面包含了一个TEXTBOX和一个LABEL(TEXT = "*",FORECOLOR = "RED")。想实现这样的功能,当TEXTBOX里面的TEXT为空的时候,LABEL就显示出来,反之LABEL就不显示。目前已经实现了这个功能,但是每次都需要提交页面一次才可以,我就想用JAVASCRIPT来在客户端实现这个功能,请问可以把JS的代码封装到这个自定义控件里面?如果可以,JS代码应该如何写?
调试欢乐多
public class wccInput : WebControl
{
protected TextBox mvTextBox;
protected Label mvLabelTip;
public wccInput()
{
this.mvLabelTip = new Label();
this.mvTextBox = new mvTextBox();
//
// mvLabel
//
this.mvTextBox.Style.Add(HtmlTextWriterStyle.Position, "absolute");
this.mvTextBox.Style.Add(HtmlTextWriterStyle.Top, "3");
this.mvTextBox.Style.Add(HtmlTextWriterStyle.Left, "1");
this.mvTextBox.Height = (Unit)12;
this.mvTextBox.Width = (Unit)80;
this.mvTextBox.ID = "mvTextBox1";
this.mvTextBox.TabIndex = 0;
//
// mvLabelTip
//
this.mvLabelTip.Style.Add(HtmlTextWriterStyle.Position, "absolute");
this.mvLabelTip.Style.Add(HtmlTextWriterStyle.Top, "6");
this.mvLabelTip.Style.Add(HtmlTextWriterStyle.Left, "166");
this.mvLabelTip.Height = (Unit)12;
this.mvLabelTip.Width = (Unit)11;
this.mvLabelTip.ForeColor = System.Drawing.Color.Red;
this.mvLabelTip.ID = "mvLabelTip";
this.mvLabelTip.TabIndex = 2;
this.mvLabelTip.Text = "*";
this.mvLabelTip.Visible = false;
} // </summary>
// <param name="output"></param>
protected override void RenderContents(HtmlTextWriter output)
{
} }
用javascript有点不方便之处是在控件中各子控件的ID是会把自定义控件前缀加上去再加原来ID生成。所以用javascript会出现ID问题!想想还有没办法解决!有需要Q我 330524561