viewstate和datatable动态录入数据示例__stoveTable_GridView_list_ViewState_DropDownList_FindControl_

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viewstate和datatable动态录入数据示例

来源: 互联网发布时间：2014-08-25

本文导语: 代码如下: private DataTable stoveTable = null; protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { //创建 EmptyDataTemplate this.GridView_list.DataBind(); } } protected void GridView_list_RowDataBound(object sender...

代码如下:

private DataTable stoveTable = null;
protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
      //创建 EmptyDataTemplate
      this.GridView_list.DataBind();
    }
}

protected void GridView_list_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
      String usage = DataBinder.Eval(e.Row.DataItem, "usage").ToString();
      String steelKind = DataBinder.Eval(e.Row.DataItem, "steelKind").ToString();
      String castingTon = DataBinder.Eval(e.Row.DataItem, "castingTon").ToString();
      DropDownList x1 = e.Row.FindControl("x1") as DropDownList;
      DropDownList x2 = e.Row.FindControl("x2") as DropDownList;
      TextBox x3 = e.Row.FindControl("x3") as TextBox;
      x3.Text = castingTon;
      ListItem xx1 = x1.Items.FindByValue(usage);
      if (xx1 != null) xx1.Selected = true;
      ListItem xx2 = x2.Items.FindByValue(steelKind);
      if (xx2 != null) xx2.Selected = true;
    }
}

protected void LinkButton1_Click(object sender, EventArgs e)
{
    DropDownList x1, x2;
    TextBox x3;
    if (GridView_list.Rows.Count == 0)
    {
      x1 = GridView_list.Controls[0].Controls[0].FindControl("x1") as DropDownList;
      x2 = GridView_list.Controls[0].Controls[0].FindControl("x2") as DropDownList;
      x3 = GridView_list.Controls[0].Controls[0].FindControl("x3") as TextBox;
    }
    else
    {
      GridViewRow r = GridView_list.FooterRow;
      x1 = r.FindControl("x1") as DropDownList;
      x2 = r.FindControl("x2") as DropDownList;
      x3 = r.FindControl("x3") as TextBox;
    }
    if (ViewState["dt"] == null)
    {
      stoveTable = new DataTable();
      stoveTable.Columns.Add("usage", typeof(String));
      stoveTable.Columns.Add("steelKind", typeof(String));
      stoveTable.Columns.Add("castingTon", typeof(String));
    }
    else
    {
      stoveTable = (DataTable)ViewState["dt"];
    }
    DataRow newRow = stoveTable.NewRow();
    newRow["usage"] = x1.SelectedValue;
    newRow["steelKind"] = x2.SelectedValue;
    newRow["castingTon"] = x3.Text;
    stoveTable.Rows.Add(newRow);

    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();

}
protected void LinkButton2_Click(object sender, EventArgs e)
{
    if (ViewState["dt"] == null)
    {
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    if (stoveTable.Rows.Count < 1) return;
    stoveTable.Rows.RemoveAt(stoveTable.Rows.Count - 1);
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
}

protected void x1_SelectedIndexChanged(object sender, EventArgs e)
{
    DropDownList x1 = sender as DropDownList;
    GridViewRow r = x1.Parent.Parent as GridViewRow;
    if (ViewState["dt"] == null)
    {
      Response.Write("Error");
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    stoveTable.Rows[r.RowIndex]["usage"] = x1.SelectedValue;
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
}

protected void x2_SelectedIndexChanged(object sender, EventArgs e)
{
    DropDownList x2 = sender as DropDownList;
    GridViewRow r = x2.Parent.Parent as GridViewRow;
    if (ViewState["dt"] == null)
    {
      Response.Write("Error");
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    stoveTable.Rows[r.RowIndex]["steelKind"] = x2.SelectedValue;
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
}

protected void x3_TextChanged(object sender, EventArgs e)
{

    TextBox x3 = sender as TextBox;
    GridViewRow r = x3.Parent.Parent as GridViewRow;
    if (ViewState["dt"] == null)
    {
      Response.Write("Error");
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    stoveTable.Rows[r.RowIndex]["castingTon"] = x3.Text;
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
}





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