C# 通过单击按钮将textchanged事件设置为true

我需要从另一个事件运行一个事件

我有这样的asp.net页面：

<div>
    <asp:TextBox ID="TextBox1" runat="server" AutoPostBack="true" OnTextChanged="TextBox1_TextChanged" />
    <asp:Label ID="Label1" runat="server" />
    <asp:TextBox ID="TextBox2" runat="server" AutoPostBack="true" OnTextChanged="TextBox2_TextChanged" />
    <asp:Label ID="Label2" runat="server" />
    <asp:TextBox ID="TextBox3" runat="server" AutoPostBack="true" OnTextChanged="TextBox3_TextChanged" />
    <asp:Label ID="Label3" runat="server" />
    <asp:Button Text="SetFromDataBase" ID="btn" runat="server" OnClick="btn_Click" />
</div>

        Dal run = new Dal();
        protected void TextBox1_TextChanged(object sender, EventArgs e)
        {
           SetLabel1Text(TextBox1.Text);         
        }
        protected void TextBox2_TextChanged(object sender, EventArgs e)
        {
            string query2 = string.Format("select * From profile where id={0}", TextBox2.Text);
            DataTable dt2 = new DataTable();
            dt2 = run.withquery(query2);
            Label2.Text = dt2.Rows[0]["profile"].ToString();
        }
        protected void btn_Click(object sender, EventArgs e)
        {
            string query3 = string.Format("select * From Db where id={0}", "1369");
            DataTable dt3 = new DataTable();
            dt3 = run.withquery(query3);
            TextBox1.Text = dt3.Rows[0]["1"].ToString();
            TextBox2.Text = dt3.Rows[0]["2"].ToString();
            TextBox3.Text = dt3.Rows[0]["3"].ToString();

            SetLabel1Text(TextBox1.Text);
        }
        public void SetLabel1Text(string txtText)
        {
            string query1 = string.Format("select * From user where id={0}", txtText);
            DataTable dt1 = new DataTable();
            dt1 = run.withquery(query1);
            Label1.Text = dt1.Rows[0]["name"].ToString();
        }

在运行事件的最后一行

TextBox1\u TextChanged

中，将

标签1.text

显示为名称。 我不知道该怎么办 谢谢你的帮助。

---

希望理解我的观点

您可以创建单独的方法来设置标签文本，如下所示：

<div>
    <asp:TextBox ID="TextBox1" runat="server" AutoPostBack="true" OnTextChanged="TextBox1_TextChanged" />
    <asp:Label ID="Label1" runat="server" />
    <asp:TextBox ID="TextBox2" runat="server" AutoPostBack="true" OnTextChanged="TextBox2_TextChanged" />
    <asp:Label ID="Label2" runat="server" />
    <asp:TextBox ID="TextBox3" runat="server" AutoPostBack="true" OnTextChanged="TextBox3_TextChanged" />
    <asp:Label ID="Label3" runat="server" />
    <asp:Button Text="SetFromDataBase" ID="btn" runat="server" OnClick="btn_Click" />
</div>

        Dal run = new Dal();
        protected void TextBox1_TextChanged(object sender, EventArgs e)
        {
           SetLabel1Text(TextBox1.Text);         
        }
        protected void TextBox2_TextChanged(object sender, EventArgs e)
        {
            string query2 = string.Format("select * From profile where id={0}", TextBox2.Text);
            DataTable dt2 = new DataTable();
            dt2 = run.withquery(query2);
            Label2.Text = dt2.Rows[0]["profile"].ToString();
        }
        protected void btn_Click(object sender, EventArgs e)
        {
            string query3 = string.Format("select * From Db where id={0}", "1369");
            DataTable dt3 = new DataTable();
            dt3 = run.withquery(query3);
            TextBox1.Text = dt3.Rows[0]["1"].ToString();
            TextBox2.Text = dt3.Rows[0]["2"].ToString();
            TextBox3.Text = dt3.Rows[0]["3"].ToString();

            SetLabel1Text(TextBox1.Text);
        }
        public void SetLabel1Text(string txtText)
        {
            string query1 = string.Format("select * From user where id={0}", txtText);
            DataTable dt1 = new DataTable();
            dt1 = run.withquery(query1);
            Label1.Text = dt1.Rows[0]["name"].ToString();
        }

---

同样，如果您还想为另一个标签设置值。

“我需要为act代码设置textchanged true”…那么问题出在哪里？发生了什么，实际发生了什么？textbox1_textchanged是一个事件处理程序。把它设为真没有任何意义。请澄清你的问题