我想用C#處理asp.net頁面上的自定義事件作爲我的代碼在後面。 我想在點擊時增加搜索文本框的大小。 這應該有點像這樣...ASP.NET中的自定義事件
我知道這是可以使用事件來完成和delegate.I試過的東西,但我不知道什麼時候我應該提高event.So我「M僅僅是提高它txtSearch_TextChanged
事件
這裏有一個片段:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
delegate void MessageEventHandler(object sender, EventArgs e);
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Session["Redirected"] != null)
{
Session["Redirected"] = null;
if (Session["FirstName"] != null)
txtSearch.Text = Session["FirstName"].ToString();
if (Session["Gender"] != null)
ddlGen.SelectedValue = Session["Gender"].ToString();
btnSearch_Click(sender, e);
}
if (!Page.IsPostBack)
{
BindGrid();
}
}
private void BindGrid()
{
//Get dataset
//bind
string query = "select EmployeeId,FirstName,Password,Address,sex,Deptno,act_book,actTV,DOJ,isActiveYN from employees";
DataSet ds = new DataSet("Employees");
SqlConnection con = new SqlConnection("Password=admin;User ID=admin;Initial Catalog=asptest;Data Source=dbsvr");
SqlDataAdapter da = new SqlDataAdapter(query, con);
da.Fill(ds);
gvSession.DataSource = ds;
gvSession.DataBind();
}
protected void btnSearch_Click(object sender, EventArgs e)
{
string query = "Select EmployeeId,FirstName,Password,Address,sex,Deptno,act_book,actTV,DOJ,isActiveYN from employees where 1=1";
if (txtSearch.Text != "")
{
query += " and FirstName like '%" + txtSearch.Text + "%'";
Session["FirstName"] = txtSearch.Text;
}
if (ddlGen.SelectedValue != "")
{
query += " and sex='" + ddlGen.SelectedValue.ToUpper() + "'";
Session["Gender"] = ddlGen.SelectedValue;
}
DataSet ds = new DataSet("Employees");
SqlConnection con = new SqlConnection("Password=admin;User ID=admin;Initial Catalog=asptest;Data Source=dbsvr");
SqlDataAdapter da = new SqlDataAdapter(query, con);
da.Fill(ds);
gvSession.DataSource = ds;
gvSession.DataBind();
}
private event MessageEventHandler texBoxOnClick;
void _Default_texBoxOnClick(object sender, EventArgs e)
{
//this function auto generates when you use += and tab twice in Visual Studio
//handle the event here
txtSearch.Width = Convert.ToInt32(300);
//throw new Exception("The method or operation is not implemented.");
}
private void OnTextBxClicked(EventArgs e)
{
if (texBoxOnClick != null)
texBoxOnClick(this, e);
}
protected void txtSearch_TextChanged(object sender, EventArgs e)
{
//adding handler
this.texBoxOnClick += new MessageEventHandler(_Default_texBoxOnClick);
//Raising a Notification
OnTextBxClicked(e);
Session["FirstName"] = "";
}
protected void ddlGen_SelectedIndexChanged(object sender, EventArgs e)
{
Session["Gender"] = "";
}
}
後最後的編輯我現在mentioned.It引發該事件時,作爲postbac發生textchange點擊搜索按鈕k.My的問題是,我無法確定何時完全打電話OnTextBxClicked(e);
因爲我希望它發生在點擊文本框時。(本網站上的鏈接本身)
在做了一點研究後,我已經理解像這樣的事件總是客戶端事件,並且應該用一些腳本語言來完成。感謝你的回答有幫助 – Pavitar
很高興我能幫忙:) –