GridView是个功能强大的控件，有时侯，我们用它来装载多行数据并编辑，最后再批量更新。在编辑时，很可能会需要在其中插入一些行用于添加新的数据，下面提供一个示例以演示实现的基本方法。
页面文件：
<
form
id
="form1"
runat
="server"
>
<
div
>
<
asp:GridView
ID
="GridView1"
runat
="server"
AutoGenerateColumns
="False"
DataKeyNames
="line"
OnSelectedIndexChanging
="GridView1_SelectedIndexChanging"
>
<
Columns
>
<
asp:CommandField
HeaderText
="插入"
SelectText
="插入行"
ShowSelectButton
="True"
/>
<
asp:TemplateField
HeaderText
="yy"
>
<
ItemTemplate
>
<
asp:TextBox
ID
="TextBox1"
runat
="server"
Text
='<%#DataBinder.Eval(Container.DataItem,"yy")
%
>
'>
</
asp:TextBox
>
</
ItemTemplate
>
</
asp:TemplateField
>
</
Columns
>
</
asp:GridView
>
</
div
>
</
form
>
代码文件：
//
初始化数据
private
void
BindData()
{
DataTable dt = CreateTable();
DataRow dr = dt.NewRow();
dr["yy"] = "hello";
dr["line"] = 0;
dt.Rows.Add(dr);
GridView1.DataSource = dt.DefaultView;
GridView1.DataBind();
}
protected
void
Page_Load(
object
sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindData();
}
}
//
创建一个表
private
DataTable CreateTable()
{
DataTable dt = new DataTable("mytable");
DataColumn dc = new DataColumn("yy", System.Type.GetType("System.String"));
dt.Columns.Add(dc);
dc = new DataColumn("line", System.Type.GetType("System.Int32"));
dt.Columns.Add(dc);
return dt;
}
protected
void
GridView1_SelectedIndexChanging(
object
sender, GridViewSelectEventArgs e)
{
DataTable dt = CreateTable();
foreach (GridViewRow gvr in GridView1.Rows)
{
if (e.NewSelectedIndex == int.Parse(GridView1.DataKeys[gvr.RowIndex][0].ToString()))//插入行的位置
{
DataRow dr = dt.NewRow();
dr["yy"] = "";
dr["line"] = e.NewSelectedIndex;
dt.Rows.Add(dr);
dr = dt.NewRow();
TextBox tb = (TextBox)gvr.Cells[1].FindControl("TextBox1");
dr["yy"] = tb.Text;
dr["line"] = e.NewSelectedIndex + 1;
dt.Rows.Add(dr);
}
else if (e.NewSelectedIndex < int.Parse(GridView1.DataKeys[gvr.RowIndex][0].ToString()))//插入行之后
{
DataRow dr = dt.NewRow();
TextBox tb = (TextBox)gvr.Cells[1].FindControl("TextBox1");
dr["yy"] = tb.Text;
dr["line"] = int.Parse(GridView1.DataKeys[gvr.RowIndex][0].ToString()) + 1;
dt.Rows.Add(dr);
}
else//插入行之前
{
DataRow dr = dt.NewRow();
TextBox tb = (TextBox)gvr.Cells[1].FindControl("TextBox1");
dr["yy"] = tb.Text;
dr["line"] = GridView1.DataKeys[gvr.RowIndex][0].ToString();
dt.Rows.Add(dr);
}
}
//重新绑定
DataView dv = dt.DefaultView;
dv.Sort = "line";//指定排序字段
GridView1.DataSource = dv;
GridView1.DataBind();
}
页面文件：
<
form
id
="form1"
runat
="server"
>
<
div
>
<
asp:GridView
ID
="GridView1"
runat
="server"
AutoGenerateColumns
="False"
DataKeyNames
="line"
OnSelectedIndexChanging
="GridView1_SelectedIndexChanging"
>
<
Columns
>
<
asp:CommandField
HeaderText
="插入"
SelectText
="插入行"
ShowSelectButton
="True"
/>
<
asp:TemplateField
HeaderText
="yy"
>
<
ItemTemplate
>
<
asp:TextBox
ID
="TextBox1"
runat
="server"
Text
='<%#DataBinder.Eval(Container.DataItem,"yy")
%
>
'>
</
asp:TextBox
>
</
ItemTemplate
>
</
asp:TemplateField
>
</
Columns
>
</
asp:GridView
>
</
div
>
</
form
>
代码文件：
//
初始化数据
private
void
BindData()
{
DataTable dt = CreateTable(); DataRow dr = dt.NewRow(); dr["yy"] = "hello"; dr["line"] = 0; dt.Rows.Add(dr); GridView1.DataSource = dt.DefaultView; GridView1.DataBind(); }
protected
void
Page_Load(
object
sender, EventArgs e)
{ if (!Page.IsPostBack) {
BindData(); } }
//
创建一个表
private
DataTable CreateTable()
{ DataTable dt = new DataTable("mytable"); DataColumn dc = new DataColumn("yy", System.Type.GetType("System.String")); dt.Columns.Add(dc); dc = new DataColumn("line", System.Type.GetType("System.Int32")); dt.Columns.Add(dc); return dt; }
protected
void
GridView1_SelectedIndexChanging(
object
sender, GridViewSelectEventArgs e)
{ DataTable dt = CreateTable(); foreach (GridViewRow gvr in GridView1.Rows) { if (e.NewSelectedIndex == int.Parse(GridView1.DataKeys[gvr.RowIndex][0].ToString()))//插入行的位置 { DataRow dr = dt.NewRow(); dr["yy"] = ""; dr["line"] = e.NewSelectedIndex; dt.Rows.Add(dr); dr = dt.NewRow(); TextBox tb = (TextBox)gvr.Cells[1].FindControl("TextBox1"); dr["yy"] = tb.Text; dr["line"] = e.NewSelectedIndex + 1; dt.Rows.Add(dr); } else if (e.NewSelectedIndex < int.Parse(GridView1.DataKeys[gvr.RowIndex][0].ToString()))//插入行之后 { DataRow dr = dt.NewRow(); TextBox tb = (TextBox)gvr.Cells[1].FindControl("TextBox1"); dr["yy"] = tb.Text; dr["line"] = int.Parse(GridView1.DataKeys[gvr.RowIndex][0].ToString()) + 1; dt.Rows.Add(dr); } else//插入行之前 { DataRow dr = dt.NewRow(); TextBox tb = (TextBox)gvr.Cells[1].FindControl("TextBox1"); dr["yy"] = tb.Text; dr["line"] = GridView1.DataKeys[gvr.RowIndex][0].ToString(); dt.Rows.Add(dr); } } //重新绑定 DataView dv = dt.DefaultView; dv.Sort = "line";//指定排序字段 GridView1.DataSource = dv; GridView1.DataBind(); }
再分享一下我老师大神的人工智能教程吧。零基础！通俗易懂！风趣幽默！还带黄段子！希望你也加入到我们人工智能的队伍中来！https://blog.csdn.net/jiangjunshow