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:
代码文件:
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 >
< 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();
}
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();
}
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