Gridview控件实现简单的绑定删除修改

Gridview是实现数据绑定最常用的控件,可是公司用的是内部的自定义控件,用的久了就忘掉了使用已久的Gridview,毕竟求职还是要靠他的啊!

        private void BindData()
        {
            DataTable dt = CommentaryViews.DataTables("summarytable='" + summarytable + "' and summaryid='" + summaryid + "' and delstatus=0", "");

            dg.ShowHeader = false;
            dg.DataSource = dt;
            dg.DataBind();
        }

        protected void dg_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            dg.PageIndex = e.NewPageIndex;

            BindData();
        }

protected void dg_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                string id = dg.DataKeys[e.Row.RowIndex].Value.ToString();
                Commentary comm = new Commentary(id);
                if (comm.Blleader == 1)
                {
                    Label lab = e.Row.Cells[0].FindControl("lblContents") as Label;
                    lab.Text = "<font color=red>" + comm.Contents + "</font>";
                }
                TextBox txt = e.Row.Cells[0].FindControl("txtContents") as TextBox;
                txt.Attributes["style"] += "display:none;";

                //控制是否可编辑,删除
                if (this.Opusr.Id != comm.Adder)
                {
                    e.Row.Cells[1].Text = "";
                }
                if (!this.Opusr.MyPerm.Get(PERM.信息简报_领导评论权限_689))
                {
                    e.Row.Cells[2].Text = "";
                }
            }
        }

  protected void dg_RowEditing(object sender, GridViewEditEventArgs e)
        {
            //先后顺序不能反
            dg.EditIndex = e.NewEditIndex;

            BindData();

            Label lab = dg.Rows[dg.EditIndex].Cells[0].FindControl("lblContents") as Label;
            lab.Attributes["style"] += "display:none;";

            TextBox txt = dg.Rows[dg.EditIndex].Cells[0].FindControl("txtContents") as TextBox;
            txt.Attributes["style"] = "";
        }

protected void dg_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            Commentary comm = new Commentary(dg.DataKeys[e.RowIndex].Value.ToString());
            comm.OperateUser = this.Opusr.Id;
            comm.AppendColValue(comm.DelstatusColInfo, 1);
            comm.Update();

            BindData();
        }

protected void dg_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            Commentary comm = new Commentary(dg.DataKeys[e.RowIndex].Value.ToString());
            comm.OperateUser = this.Opusr.Id;
            comm.AppendColValue(comm.ContentsColInfo, ((TextBox)(dg.Rows[e.RowIndex].Cells[0].FindControl("txtContents"))).Text.ToString().Trim());
            comm.Update();

            dg.EditIndex = -1;
            BindData();
        }

        protected void dg_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            dg.EditIndex = -1;

            BindData();
        }

另外:对于一些command,比如delete,edit等是作为系统已用的操作,在命名的时候不能占用系统的commandname.

事件的触发顺序:显示itemcommand,然后才是具体的RowDeleting等,执行断点会发现,首先进入itemcommand,然后才是

RowDeleting,在itemcommand里面可以判断具体的commandname.

事项二:如果要对删除添加删除确定说明,可有如下方式:

1,在绑定的时候lb.Attributes.Add("onclick", "return confirm('您真的要删除此行吗？')");

2,转换成模板，然后编辑这个模板列，选中用于删除的Button，将其onClientClick属性设为

return confirm('您确认删除要删除么？').

事项三:另外,如果Gridview里外都需要进行验证,必须建立2个ValidationGroup.外面的很好解决,里面的也是对模版列,按钮列绑定ValidationGroup.如下:

  <asp:TemplateField HeaderText="排序号">
                        <EditItemTemplate>
                            <asp:RangeValidator ID="RangeValidator2" runat="server" ControlToValidate="TextBox2"
                                Display="None" ErrorMessage="排序号必须为大于0的整数" MaximumValue="9999" MinimumValue="0"
                                SetFocusOnError="True" Type="Integer" ValidationGroup="update"></asp:RangeValidator>
                            <asp:TextBox ID="TextBox2" Width="40px" ValidationGroup="update" runat="server" Text='<%# Bind("indexid") %>'></asp:TextBox>
                        </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="Label2" runat="server" Text='<%# Bind("indexid") %>'></asp:Label>
                        </ItemTemplate>
                        <ItemStyle Width="10%" HorizontalAlign="Center" />
 </asp:TemplateField>
 <asp:CommandField ShowEditButton="True" ValidationGroup="update">
                        <ItemStyle Width="13%" />
 </asp:CommandField>

这是与上面对应的验证提示框:

<asp:ValidationSummary ID="ValidationSummary2" runat="server" ShowSummary="false"
 ShowMessageBox="true" ValidationGroup="update" />

这是页面中另一个提示框:

 <asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowSummary="false"
 ShowMessageBox="true" ValidationGroup="add" />

特殊说明:

利用 GridView自带的 “选择”，“删除”功能，在本机是中文，但是布置到服务器后却是英文，

可以在Page_Load事件中增加一下作为第一行代码，解决英文显示的问题：

(MyGridView.Columns[3] as CommandField).SelectText = "选择";
(MyGridView.Columns[4] as CommandField).DeleteText = "删除";

事项四:GRIDVIEW中对齐方式:

horizontalalign="center" verticalalign="Middle"