ASP.NET

加载：

点击编辑：

数据库设计：

前端代码：

1.  DataKeyNames="ID"  设置点击“编辑”选项的时候，要获取的值，一般获取ID主键，便于修改数据。
2.  AutoGenerateColumns="False"  设置“设置是否自动生成列”为False。
3.  ReadOnly="True"  设置为只读，这样在点击编辑的时候，设置为只读的字段，不会变成文本框。
4.  DataField="ID"  设置绑定数据的字段名称。
5.  OnRowEditing ="GridView1_RowEditing"  编辑。
6.  OnRowDeleting ="GridView1_RowDeleting"  删除。
7.  OnRowCancelingEdit ="GridView1_RowCancelingEdit"  取消。
8.  OnRowUpdating ="GridView1_RowUpdating1">  更新。

<form id="form1" runat="server">
<div>
    <asp:GridView ID="GridView1" runat="server"
        DataKeyNames="ID"
        AutoGenerateColumns="False"
        OnRowEditing ="GridView1_RowEditing"
        OnRowDeleting ="GridView1_RowDeleting"
        OnRowCancelingEdit ="GridView1_RowCancelingEdit"
        OnRowUpdating ="GridView1_RowUpdating1">
        <Columns>
            <asp:BoundField HeaderText="ID" DataField="ID" ReadOnly="True" />
            <asp:BoundField HeaderText="Name" DataField="Name" ReadOnly="True" />
            <asp:BoundField HeaderText="Score" DataField="Score"/>
            <asp:CommandField HeaderText ="删除" ShowDeleteButton="true" />
            <asp:CommandField HeaderText="修改" ShowEditButton="True" />
        </Columns>
    </asp:GridView>
</div>
</form>

后台代码：

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindSoure();
    }
}

/// <summary>
/// 绑定数据源
/// </summary>
public void BindSoure()
{
    this.GridView1.DataSource = SQLHelper.ExecuteTable("select ID, Name, Score from Tb_Mark", System.Data.CommandType.Text);
    this.GridView1.DataBind();
}

/// <summary>
/// 编辑记录
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
    //获得编辑列
    GridView1.EditIndex = e.NewEditIndex;
    //重新绑定数据
    BindSoure();
}

/// <summary>
/// 删除记录
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
    //获取编辑列的键值对中的值。在属性的DataKeyNames中设置。对一个的ID
    int UpdateIdentifier = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());

    string text = "delete from Tb_Mark where ID = '" + UpdateIdentifier + "'";

    if (SQLHelper.ExecuteNonQuery(text, System.Data.CommandType.Text) != 1)
    {
        ClientScript.RegisterStartupScript(this.GetType(), "msg", "<script>alert('删除失败！')</script>");
    }
    //重新绑定数据
    BindSoure();
}

/// <summary>
/// 取消修改
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
    //退出编辑状态
    GridView1.EditIndex = -1;
    //重新绑定数据
    BindSoure();
}

/// <summary>
/// 更新修改
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowUpdating1(object sender, GridViewUpdateEventArgs e)
{
    //获取编辑列的键值对中的值。在属性的DataKeyNames中设置。对一个的ID
    int UpdateIdentifier = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
    //获取第三列Score的值(从0开始)，要修改的值。
    int UpdateValue = Convert.ToInt32(((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString());

    string text = "update Tb_Mark set Score = '" + UpdateValue + "' where ID = '" + UpdateIdentifier + "'";

    if (SQLHelper.ExecuteNonQuery(text, System.Data.CommandType.Text) != 1)
    {
        ClientScript.RegisterStartupScript(this.GetType(), "msg", "<script>alert('更新失败！')</script>");
    }
    //退出编辑状态
    GridView1.EditIndex = -1;
    //重新绑定数据
    BindSoure();
}