如何获取光标运动的值？ [英] How to fetch the value on curser movement?
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问题描述
您好...
我在动态添加行时有三个文本框。
前两个用于输入乘法数字。
第三个用于显示乘法结果。
我想要乘法的结果我输入
前两个文本框中的数字，而不按任何按钮，甚至不按3文本框，就会出现在第三个文本框中。
有谁知道怎么做？
我尝试过：
Hello...
I have three textboxes on a dynamically adding rows.
The first two are for entering numbers for multiplication.
And the third is for displaying the result of multiplication.
I want the result of multiplication to appear in the third textbox as soon as I enter
the numbers in the first two textboxes, without pressing any buttons and not even pressing 3 textbox .
Does anyone know how to do this?
What I have tried:
private void SetInitialRow()
{
string lit1 = "First";
string lit2 = "units @ Rs.";
//string lit3 = "= Rs.";
string lit3 = "=Rs1.";
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("First", typeof(string)));
dt.Columns.Add(new DataColumn("Column2", typeof(string)));
dt.Columns.Add(new DataColumn("Second", typeof(string)));
dt.Columns.Add(new DataColumn("Column4", typeof(string)));
dt.Columns.Add(new DataColumn("Third", typeof(string)));
dt.Columns.Add(new DataColumn("Column6", typeof(string)));
// dt.Columns.Add(new DataColumn("fourth", typeof(string)));
//dt.Columns.Add(new DataColumn("Column8", typeof(string)));
dr = dt.NewRow();
dr["First"] = lit1;
dr["Column2"] = string.Empty;
dr["Second"] = lit2;
dr["Column4"] = string.Empty;
dr["Third"] = lit3;
dr["Column6"] = string.Empty;
// dr["fourth"] = lit4;
// dr["Column8"] = string.Empty;
dt.Rows.Add(dr);
//dr = dt.NewRow();
//Store the DataTable in ViewState
ViewState["tbl_site_da_electricity"] = dt;
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();
}
private void AddNewRowToGrid()
{
int rowIndex = 0;
string lit1 = "Next";
string lit2 = "units @ Rs.";
//string lit3 = "= Rs.";
string lit3 = "=Rs1.";
if (ViewState["tbl_site_da_electricity"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["tbl_site_da_electricity"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("tb_first");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("tb_rupees");
// TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("tb_rowTotal");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("tb_rowTotal1");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["First"] = lit1;
dtCurrentTable.Rows[i - 1]["Column2"] = box1.Text;
drCurrentRow["Second"] = lit2;
dtCurrentTable.Rows[i - 1]["Column4"] = box2.Text;
drCurrentRow["Third"] = lit3;
dtCurrentTable.Rows[i - 1]["Column6"] = box3.Text;
//drCurrentRow["fourth"] = lit4;
// dtCurrentTable.Rows[i - 1]["Column8"] = box4.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["tbl_site_da_electricity"] = dtCurrentTable;
Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["tbl_site_da_electricity"] != null)
{
DataTable dt = (DataTable)ViewState["tbl_site_da_electricity"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("tb_first");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("tb_rupees");
// TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("tb_rowTotal");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("tb_rowTotal1");
box1.Text = dt.Rows[i]["Column2"].ToString();
box2.Text = dt.Rows[i]["Column4"].ToString();
box3.Text = dt.Rows[i]["Column6"].ToString();
// box4.Text = dt.Rows[i]["Column8"].ToString();
rowIndex++;
}
}
}
}
protected void tb_rupees_TextChanged(object sender, EventArgs e)
{
int rowIndex = 0;
DataTable dt = (DataTable)ViewState["tbl_site_da_electricity"];
int abc = 0;
int aa = 0;
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
(TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("tb_first");
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("tb_first");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("tb_rupees");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("tb_rowTotal1");
TextBox box4 = (TextBox)Gridview1.FooterRow.Cells[1].FindControl("tb_Total_Unit");
TextBox box5 = (TextBox)Gridview1.FooterRow.Cells[5].FindControl("tb_alowdTotal");
//char executive, superviser, workers;
int a = 0, b = 0;
a = Convert.ToInt32(box1.Text);
b = Convert.ToInt32(box2.Text);
aa = aa + Convert.ToInt32(box1.Text);
if (tb_designation.Text.ToString() == "executive")
{
if (aa <= 300)
{
box3.Text = (a * b).ToString();
abc = abc + Convert.ToInt32(box3.Text);
}
else
{
aa = aa - Convert.ToInt32(box1.Text);
box3.Text = ((300 - aa) * b).ToString();
abc = abc + Convert.ToInt32(box3.Text);
aa = 300;
}
}
else if (tb_designation.Text.ToString() == "supervisor")
{
if (aa <= 250)
{
box3.Text = (a * b).ToString();
abc = abc + Convert.ToInt32(box3.Text);
}
else
{
aa = aa - Convert.ToInt32(box1.Text);
box3.Text = ((250 - aa) * b).ToString();
abc = abc + Convert.ToInt32(box3.Text);
aa = 250;
}
}
else if (tb_designation.Text.ToString() == "workers")
{
if (aa <= 200)
{
box3.Text = (a * b).ToString();
abc = abc + Convert.ToInt32(box3.Text);
}
else
{
aa = aa - Convert.ToInt32(box1.Text);
box3.Text = ((200 - aa) * b).ToString();
abc = abc + Convert.ToInt32(box3.Text);
aa = 200;
}
}
box4.Text = aa.ToString();
box5.Text = abc.ToString();
rowIndex++;
}
}
}
<pre><%
<fieldset>
<asp:UpdatePanel ID="updPanelelectricity" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<asp:GridView ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false"
GridLines="None" >
<Columns>
<asp:BoundField DataField="First" />
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="tb_first" runat="server" Width="50px" autocomplete="off" ></asp:TextBox></ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="tb_Total_Unit" runat="server" Width="50px" ></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Second" />
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="tb_rupees" runat="server" Width="50px" AutoPostBack="True" OnTextChanged="tb_rupees_TextChanged"></asp:TextBox></ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Third" />
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="tb_rowTotal1" runat="server" Width="50px" ></asp:TextBox></ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="tb_alowdTotal" runat="server" Width="50px" ></asp:TextBox></FooterTemplate>
</asp:TemplateField>
<asp:TemplateField>
<FooterTemplate>
<asp:Button ID="ButtonAdd" runat="server" Text="Add" OnClick="ButtonAdd_Click" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
</fieldset>
推荐答案
处理 TextChanged 事件，并更新第三个文本框。作为asp.net，我敢肯定你必须做一些页面更新才能让它出现在屏幕上。如果你做得对，只会更新文本框而不是整个页面。
Handle the TextChanged event, and update the third textbox. Being asp.net, I'm sure you have to do some sort of page update to make it show up on the screen. If you're doing it right, only the textbox will be updated instead of the whole page.
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