如何在回发后将焦点集中在 TextBox 上以及为什么 Repeater 控件在 TextBox 为空时显示数据？

发布于 2024-12-04 18:26:20 字数 1779 浏览 1 评论 0原文

我正在开发一个 C# ASP.NET 4 项目，其中我需要一个搜索框，可以动态搜索数据库表中的内容，并在每次输入时在 Repeater Control 中显示它TextBox 中的字母表。

我已经做到了这一点，但问题是

1）每次输入单个字母时，我都会失去对 TextBox 的关注
2）当我删除 TextBox 中的内容时，Repeater Control 仍然显示数据

<asp:TextBox ID="TextBox1" runat="server" Width="90%" 
                                ontextchanged="TextBox1_TextChanged" 
                                onKeyUp="return serachme()" 
                                AutoPostBack="false"></asp:TextBox>
                                <script language="javascript" type="text/javascript">
                                    function serachme() {
                                        __doPostBack('<%=TextBox1.UniqueID %>', "onKeyUp");
                                    }
                                </script>

而且，

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    con.Open();
    SqlDataAdapter mycommand2 = new SqlDataAdapter("select qid,title from globalq where title like '%" + TextBox1.Text + "%'", con);
    DataSet ds = new DataSet();
    mycommand2.Fill(ds);
    askQ.DataSource = ds;
    askQ.DataBind();
    con.Close();
}

我已经看到了回发后在文本框中设置焦点和回发后在 TextBox 中设置焦点但不理解它，因为我不知道JavaScript 就这么多。

所以我的问题是

1) 如何在每次 __doPostBack 时聚焦于 TextBoX？
2) 当我删除TextBox中的内容时，为什么Repeater Control仍然显示数据以及如何不显示数据？

感谢您提前做出的努力，

尼基尔

原文

I am working on a C# ASP.NET 4 project where I need to have a search box that dynamically searches the content from database's table and shows it in Repeater Control everytime I enter alphabet in TextBox.

I have done it upto this but the problem is

1) I am losing focus on TextBox everytime I enter single alphabet

2) When I erase content in TextBox, Repeater Control still shows data

<asp:TextBox ID="TextBox1" runat="server" Width="90%" 
                                ontextchanged="TextBox1_TextChanged" 
                                onKeyUp="return serachme()" 
                                AutoPostBack="false"></asp:TextBox>
                                <script language="javascript" type="text/javascript">
                                    function serachme() {
                                        __doPostBack('<%=TextBox1.UniqueID %>', "onKeyUp");
                                    }
                                </script>

And,

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    con.Open();
    SqlDataAdapter mycommand2 = new SqlDataAdapter("select qid,title from globalq where title like '%" + TextBox1.Text + "%'", con);
    DataSet ds = new DataSet();
    mycommand2.Fill(ds);
    askQ.DataSource = ds;
    askQ.DataBind();
    con.Close();
}

I already saw examples of Set focus in TextBox after postback
and Set focus in TextBox after postback but did not understood it coz I dont know JavaScript that much.

So my Question is

1) How to get focus on TextBoX everytime I __doPostBack?
2) When I erase content in TextBox, Why Repeater Control still shows data and how to not show that?

Thanks for your efforts in advance,

Nikhil

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乖乖哒 2024-12-11 18:26:20

你试过这个吗？：

con.Open(); 
SqlDataAdapter mycommand2 = new SqlDataAdapter("select qid,title from globalq where title like '%" + TextBox1.Text + "%'", con); 
DataSet ds = new DataSet(); 
mycommand2.Fill(ds); 
askQ.DataSource = ds; 
askQ.DataBind(); 
con.Close(); 

//apply focus back to textbox
TextBox1.Focus();

Have you tried this?:

con.Open(); 
SqlDataAdapter mycommand2 = new SqlDataAdapter("select qid,title from globalq where title like '%" + TextBox1.Text + "%'", con); 
DataSet ds = new DataSet(); 
mycommand2.Fill(ds); 
askQ.DataSource = ds; 
askQ.DataBind(); 
con.Close(); 

//apply focus back to textbox
TextBox1.Focus();

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