页面中：
<input type="text" οnblur="callToServer();" name="txtUsername" style="width: 160px" maxlength="20"/>服务器控件一样可以用Attributes.Add()添加:οnblur="callToServer();" <span id="Question">*********</span>
<script type="text/javascript"> function callToServer() { var param = document.getElementById("txtUsername").value; var context = ""; CallTheServer(param,context); }</script>
cs文件中
public partial class HrUser_ForgetPassword : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler ... { public string reString = "您输入的用户名不存在"; public void RaiseCallbackEvent(String eventArgument) ...{ Model.UserLogin model = new Model.UserLogin(); BLL.UserLogin bll = new BLL.UserLogin(); model = bll.GetModel(eventArgument); if (model != null) reString = model.Answer; } public string GetCallbackResult() ...{ return reString.ToString(); } protected void Page_Load(object sender, EventArgs e) ...{ ClientScriptManager cs = Page.ClientScript; StringBuilder context = new StringBuilder(); context.Append("function ReceiveServerData(arg, context)"); context.Append("{"); context.Append("Question.innerText = arg;"); context.Append("value = arg;"); context.Append("}"); String cbReference = cs.GetCallbackEventReference(this, "arg", "ReceiveServerData", context.ToString()); String callbackScript = "function CallTheServer(arg, context) {" + cbReference + "; }"; cs.RegisterClientScriptBlock(this.GetType(), "CallTheServer", callbackScript, true); } }这样在文本框失去焦点时<span id="Question">*********</span>中的文本就会被设置为服务器回传过来的数据
