自动完成文本框不显示结果在点击文本框
本文关键字:文本 结果 显示 | 更新日期: 2023-09-27 18:11:21
我有一个autocomplete
textbox
,它过滤了我想要搜索的内容。但是现在我想要的是
如果用户不输入任何东西到
textbox
,只是点击textbox
。它应该显示所有的结果。这可能吗?
下面是我的代码。
$(document).ready(function () {
SearchText();
});
function SearchText() {
$("#txt712").autocomplete({
source: function (request, response) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Frm_Agreement_Master.aspx/GetAutoCompleteData",
data: "{'username':'" + extractLast(request.term) + "'}",
dataType: "json",
success: function (data) {
response(data.d);
},
error: function (result) {
alert("Error");
}
});
},
focus: function () {
return false;
},
select: function (event, ui) {
var terms = split(this.value);
terms.pop();
terms.push(ui.item.value);
terms.push("");
this.value = terms.join(", ");
return false;
}
});
$("#txt712").bind("keydown", function (event) {
if (event.keyCode === $.ui.keyCode.TAB &&
$(this).data("autocomplete").menu.active) {
event.preventDefault();
}
})
function split(val) {
return val.split(/,'s*/);
}
function extractLast(term) {
return split(term).pop();
}
}
也找到我从哪里得到的参考链接。
参考链接服务器端代码
[WebMethod]
public static List<string> GetAutoCompleteData(string username)
{
List<string> result = new List<string>();
using (OracleConnection ObjPriCon = new OracleConnection(System.Configuration.ConfigurationManager.ConnectionStrings["OracleConn"].ToString()))
{
using (OracleCommand cmd = new OracleCommand("select distinct survey_area_7_12 FROM xxcus.xxacl_pn_farming_mst WHERE survey_area_7_12 LIKE '%' || :searchtext || '%'", ObjPriCon))
{
ObjPriCon.Open();
cmd.Parameters.AddWithValue(":searchtext", username.ToLower());
OracleDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
result.Add(dr["survey_area_7_12"].ToString());
}
}
return result;
}
}
}
在Server代码中检查搜索字符串是否为空并相应触发查询
public static List<string> GetAutoCompleteData(string username)
{
List<string> result = new List<string>();
using (SqlConnection con = new SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB"))
{
**//check if user name is not null**
if(null != username){
using (SqlCommand cmd = new SqlCommand("select DISTINCT UserName from UserInformation where UserName LIKE '%'+@SearchText+'%'", con))}
else{
using (SqlCommand cmd = new SqlCommand("select UserName from UserInformation, con))}
}
{
con.Open();
cmd.Parameters.AddWithValue("@SearchText", username);
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
result.Add(dr["UserName"].ToString());
}
您可以使用"Focus"事件来完成此操作。
.focus(function () {
$(this).autocomplete("search");
});
完整代码如下。
$("#txt712").autocomplete({
source: function (request, response) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Frm_Agreement_Master.aspx/GetAutoCompleteData",
data: "{'username':'" + extractLast(request.term) + "'}",
dataType: "json",
success: function (data) {
response(data.d);
},
error: function (result) {
alert("Error");
}
});
},
focus: function () {
$(this).autocomplete("search"); //New Code
},
select: function (event, ui) {
var terms = split(this.value);
terms.pop();
terms.push(ui.item.value);
terms.push("");
this.value = terms.join(", ");
return false;
}
});