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如何在DataGridView中添加新的空行?

[英]How can i add a new empty row in a DataGridView?

I have a DataGridView and I want to add a new row with empty cells, but I don't know the number of columns (variable) in the DataGridView. 我有一个DataGridView,我想添加一个带有空单元格的新行,但是我不知道DataGridView中的列数(变量)。 Is there a simple way to do this? 有没有简单的方法可以做到这一点?

You can do that easily using following code. 您可以使用以下代码轻松地做到这一点。 The markup below is for a page with gridview and C# code below is for button click event that adds an empty row without any specific knowledge of the names or datatypes of columns. 下面的标记用于带有gridview的页面,下面的C#代码用于按钮单击事件,该事件在没有任何特定列名称或数据类型的特定知识的情况下添加一个空行。

This is tried and tested. 这是经过尝试和测试的。

C# code for button click to add a new empty row 单击按钮的C#代码以添加新的空行

protected void btn1_Click(object sender, EventArgs e)
{
    GridViewRow row1 = GridView1.Rows[0];
    GridViewRow row = new GridViewRow(0, 0, DataControlRowType.DataRow, DataControlRowState.Insert);
    for (int i = 0; i < row1.Cells.Count; i++)
    {
        TableCell cell = new TableCell();
        cell.Text = "&nbsp;";
        row.Cells.Add(cell);
        Table parentTable = row1.Parent as Table;
        parentTable.Rows.Add(row);
    }
}

aspx Markup with gridview 使用GridView的aspx标记

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewSample.aspx.cs" Inherits="GridViewSample" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Button ID="btn1" runat="server" Text="Add Row" OnClick="btn1_Click" />
            <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" DataKeyNames="ProductID" DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None">
                <AlternatingRowStyle BackColor="White" />
                <Columns>
                    <asp:BoundField DataField="ProductID" HeaderText="ProductID" ReadOnly="True" SortExpression="ProductID" />
                    <asp:BoundField DataField="ProductName" HeaderText="ProductName" SortExpression="ProductName" />
                    <asp:BoundField DataField="QuantityPerUnit" HeaderText="QuantityPerUnit" SortExpression="QuantityPerUnit" />
                    <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" SortExpression="UnitPrice" />
                    <asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock" SortExpression="UnitsInStock" />
                    <asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder" SortExpression="UnitsOnOrder" />
                    <asp:BoundField DataField="CategoryName" HeaderText="CategoryName" SortExpression="CategoryName" />
                </Columns>
                <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
                <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
                <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
                <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
                <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
                <SortedAscendingCellStyle BackColor="#FDF5AC" />
                <SortedAscendingHeaderStyle BackColor="#4D0000" />
                <SortedDescendingCellStyle BackColor="#FCF6C0" />
                <SortedDescendingHeaderStyle BackColor="#820000" />
            </asp:GridView>
            <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthWindConnectionString %>" SelectCommand="SELECT [ProductID], [ProductName], [QuantityPerUnit], [UnitPrice], [UnitsInStock], [UnitsOnOrder], [CategoryName] FROM [Alphabetical list of products]"></asp:SqlDataSource>
        </div>
    </form>
</body>
</html>

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