如何自动计算页面加载 [英] How to Auto Calculate on Page Load

问题描述

我在表单上有两个文本框.我有一个页面加载中的文本框代码.我想做的是让表单在用户在文本框中输入一些数字时自动计算.这是我的代码:

I have two textboxes on a form. I have a code for the textboxes in Page Load. What I am trying to do is to have the form to auto calculate when a user inputs some numbers in the textboxes. Here is the code I have:

int a = Convert.ToInt32(TextBoxTA.Text);
        int b = Convert.ToInt32(TextBoxTL.Text);
        TextBoxTNA.Text = Convert.ToString(a - b); 

我用于除法的其他代码:

The other code I have for Dividing:

int a = Convert.ToInt32(TextBoxTHUG.Text);
        TextBoxTHUGDR.Text = Convert.ToString(a / 12);

我正在尝试在用户输入一些数字时自动为用户计算.这可能吗，或者我做错了吗?请帮忙!!

页面加载代码:

I am trying to auto calculate for the user when the user inputs some numbers. Is this possible or am I doing it wrong? Please Help!!

Page Load Code:

protected void Page_Load(object sender, EventArgs e)

    {
        ButtonPrint.Attributes.Add("onclick", "window.print(); return false");
        

       SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["PasswordConnectionString"].ConnectionString);
       con.Open();
       SqlConnection con2 = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["PasswordConnectionString"].ConnectionString);
       con2.Open();

       TextBoxINST_ID.Text = Session["inst_id"].ToString();
       SqlCommand scmd = new SqlCommand("Select INST_ID, LongName, City, State from TableCOCINST where INST_ID = '" + TextBoxINST_ID.Text + "'", con);
       SqlCommand scmd2 = new SqlCommand("Select INST_ID, FT_UNDERGR, FT_GRAD, FTE_UNDERG, FTE_GRAD, NON_CREDIT, TOTAL_FTE, FCFTUHC, FCFTPBHC, FCPTUHC, FCPTPBHC, NCHC, FTEYR from TableFTE2012 where INST_ID = '" + TextBoxINST_ID.Text + "'", con2);
       SqlDataReader dr = scmd.ExecuteReader();
       SqlDataReader dr2 = scmd2.ExecuteReader();
       if (dr.Read())
       if (dr2.Read())
       {
           TextBoxLYFTUG.Text = dr2["FT_UNDERGR"].ToString();
           TextBoxLYFTG.Text = dr2["FT_GRAD"].ToString();
           TextBoxLYTHUGDR.Text = dr2["FTE_UNDERG"].ToString();
           TextBoxLYTHGDR.Text = dr2["FTE_GRAD"].ToString();
           TextBoxLYNCCDR.Text = dr2["NON_CREDIT"].ToString();
           TextBoxLYTCNC.Text = dr2["TOTAL_FTE"].ToString();
           TextBoxLYTNFUG.Text = dr2["FCFTUHC"].ToString();
           TextBoxLYTNFG.Text = dr2["FCFTPBHC"].ToString();
           TextBoxLYTNCPUG.Text = dr2["FCPTUHC"].ToString();
           TextBoxLYTNCPG.Text = dr2["FCPTPBHC"].ToString();
           TextBoxLYTNNCC.Text = dr2["NCHC"].ToString();
           TextBoxINST_ID.Text = dr["INST_ID"].ToString();
           lblSchool.Text = dr["LongName"].ToString();
           lblCity.Text = dr["City"].ToString();
           lblState.Text = dr["State"].ToString();
           lblLYear.Text = dr2["FTEYR"].ToString();
           
       }
       dr.Close();
       con.Close();
       dr2.Close();
       con2.Close();


    }

推荐答案

在Page_Load中，编写以下代码:

TextBoxTA.TextChanged + =新的EventHandler(TextBoxTA_TextChanged);

然后在必须放置代码的地方编写TextBoxTA_TextChanged()方法，

In Page_Load, write below code :

TextBoxTA.TextChanged += new EventHandler(TextBoxTA_TextChanged);

then write TextBoxTA_TextChanged() method where you have to place your code,

void TextBoxTA_TextChanged(object sender, EventArgs e)
        {
            // Place your code here

        }

对两个文本框都执行此操作.
希望对您有帮助.

Do this for both the textboxes.
Hope it helps you.

如果要在客户端脚本上处理它，可以使用Javascript/Jquery.

您可以尝试以下

If you want to handle it on client side script Javascript/Jquery can be used .

You can try something like below

<script type="text/javascript">

function Addition() {
        var TA = document.getElementById("TextBoxTA").value;
        var TL = document.getElementById("TextBoxTL").value;
        if ((TA != "") && (TL != "") && (typeof TA !== "undefined") && (TL !== "undefined")) {
            var AddResult = parseInt(TA) + parseInt(TL);
            document.getElementById("TextBoxTNA").value = AddResult.toString();
        }
    }
</script></script>

在任何Keyup，Textchanged，Onblur事件中调用JS脚本

Call the JS script on any of the Keyup,Textchanged, Onblur events

<asp:TextBox ID="TextBoxTA" runat="server"  onblur="Addition()" ></asp:TextBox>
        <asp:TextBox ID="TextBoxTL" runat="server" onblur="Addition()"></asp:TextBox>
        <asp:TextBox ID="TextBoxTNA" runat="server"  ></asp:TextBox>

希望对您有帮助

Hope this helps

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