Question

我已经编写了这段代码来创建一个包含3列的网格视图

DataTable dt = new DataTable();
dt = new DataTable();
dt.Columns.Add("ID", typeof(int)).AutoIncrement = true;
dt.Columns.Add("Name", typeof(string));
dt.Columns.Add("Price(Grouch)/Hectares", typeof(float));
DataColumn[] keys = new DataColumn[2];
keys[0] = dt.Columns["ID"];
dt.PrimaryKey = keys;
dt.Rows.Add("1", "Seaside Location", 1.5);

Session[key] = dt;
return dt;

我想在此代码中添加一个包含数量的文本框。

当我在另一个文本框中给出我想要的数量时，可以得到总数。

例如2 * 1.5 = 3

我该怎么做？

我的一个大问题是我不知道如何取第3列的值。本例中的值为1.5。

Answer 1

要从第三列获取值，您可以迭代该数组：

GridView.Rows[index].Cells[2].Value.ToString());

示例：

String TextIn4thRow3rdColumn = myGridView.Rows[3].Cells[2].Value.ToString());

Answer 2

如果我理解正确，您需要价格列中的TextBox和总价格的文本框。您可以使用TemplateColumn在文本框中显示价格，使用页脚显示总价。

ASPX：

  <asp:GridView ID="GridView1" runat="server" ShowFooter="true" AutoGenerateColumns="false" >
        <Columns>
        <asp:BoundField HeaderText="ID" DataField="Name" />
        <asp:BoundField HeaderText="Name" DataField="Name" />
        <asp:TemplateField HeaderText="Price(Grouch)/Hectares">
            <ItemTemplate>
                <asp:TextBox ID="TxtPrice" runat="server"></asp:TextBox>
            </ItemTemplate>
            <FooterTemplate>
                <asp:TextBox ID="TxtTotal" runat="server" Text="0"></asp:TextBox>
            </FooterTemplate>
        </asp:TemplateField>
        </Columns>
    </asp:GridView>

对不起VB.Net，我希望你看到我的意思，导入部分在GridView的RowDataBound中：

   Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            BindGrid()
        End If
    End Sub

    Private Sub BindGrid()
        Dim dt As New DataTable
        dt.Columns.Add("ID", GetType(Int32)).AutoIncrement = True
        dt.Columns.Add("Name", GetType(String))
        dt.Columns.Add("Price(Grouch)/Hectares", GetType(Single))
        dt.PrimaryKey = New DataColumn() {dt.Columns("ID")}
        Dim newRow As DataRow = dt.NewRow
        newRow("ID") = 1
        newRow("Name") = "Seaside Location"
        newRow("Price(Grouch)/Hectares") = 1.5
        dt.Rows.Add(newRow)
        newRow = dt.NewRow
        newRow("ID") = 2
        newRow("Name") = "City Location"
        newRow("Price(Grouch)/Hectares") = 7.9
        dt.Rows.Add(newRow)
        Me.GridView1.DataSource = dt
        Me.GridView1.DataBind()
    End Sub

    Private totalPrice As Single = 0
    Private Sub GridRowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
        If e.Row.RowType = DataControlRowType.DataRow Then
            Dim row As DataRow = DirectCast(e.Row.DataItem, DataRowView).Row
            Dim txtPrice As TextBox = DirectCast(e.Row.FindControl("TxtPrice"), TextBox)
            Dim price As Single = DirectCast(row("Price(Grouch)/Hectares"), Single)
            txtPrice.Text = price.ToString
            totalPrice = totalPrice + price
        ElseIf e.Row.RowType = DataControlRowType.Footer Then
            Dim txtTotal As TextBox = DirectCast(e.Row.FindControl("TxtTotal"), TextBox)
            txtTotal.Text = totalPrice.ToString
        End If
    End Sub

如何将文本框与gridview列相乘

2 个答案: