自定义的ValidationSummary控件

一. 目的：

     实现一个带linked的ValidationSummary控件

二. 实现：

     

/// <summary>
    /// 验证控件
    /// </summary>
    [ToolboxData("<{0}:ValidationSummaryControl runat=server></{0}:ValidationSummaryControl>")]
    public class ValidationSummaryControl : ValidationSummary
    {
        #region 变量
        /// <summary>
        /// 设置控件焦点的脚本
        /// </summary>
        private static readonly string strJs = @"function setFocus(control)
                                           {
                                               var controlToValidate = document.getElementById(control);
                                               controlToValidate.focus();
                                           }  ";
        #endregion       

        #region 事件

        protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);

            //注册脚本
            RegisterScript();           
        }

        protected override void Render(HtmlTextWriter writer)
        {
            MakeClickableErrorMessage();

            base.Render(writer);
        }

        #endregion  
        
        #region 私有方法

        /// <summary>
        /// 让错误信息能够定位相应控件
        /// </summary>
        private void MakeClickableErrorMessage()
        {
            foreach (BaseValidator validator in this.Page.Validators)
            {
                if (validator.ControlToValidate == string.Empty || validator.ErrorMessage == string.Empty)
                {
                    continue;
                }

                //获取需验证的控件
                Control controlToValidate = validator.Parent.FindControl(validator.ControlToValidate);
                if (null != controlToValidate)
                {
                    string clientID = controlToValidate.ClientID;
                    string script = string.Format("<a href= \"javascript:setFocus('{0}');\">{1}</a>", clientID, validator.ErrorMessage);
                    //给错误信息添加linked
                    validator.ErrorMessage = script;
                    validator.Display = ValidatorDisplay.None;
                }
            }
        }

        /// <summary>
        /// 注册脚本
        /// </summary>
        private void RegisterScript()
        {
            if (!Page.ClientScript.IsClientScriptBlockRegistered(this.GetType(), "__ValidationSummaryControl"))
            {
                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "__ValidationSummaryControl", strJs, true);
            }
        }

        #endregion
    }

 

一个带有linked的ValidationSummary控件就写好了。

三. 说明:

     其中MakeClickableErrorMessage方法是可以放在OnPreRender方法中的，但是与我后来做得一个带有验证控件的TextBox有冲突，所以把MakeClickableErrorMessage方法写到了Render方法中去了。