动态添加模板列及保持页面状态

 
前台

HTML code

<form id="form1" runat="server">
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
            <EmptyDataTemplate>
                <asp:Label ID="Label1" runat="server" Text="没有数据!"></asp:Label>
            </EmptyDataTemplate>
        </asp:GridView>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
    </form>

后台

C# code

 protected void Page_Init(object sender, EventArgs e)
    {
        Dictionary<string, string> columnsInfo = new Dictionary<string, string>();
        columnsInfo.Add("Number", "编号");
        columnsInfo.Add("Code", "编码");
        columnsInfo.Add("Name", "名称");

        foreach (string nameKey in columnsInfo.Keys)
        {
            TemplateField customTemp = new TemplateField();
            customTemp.HeaderText = columnsInfo[nameKey];
            GridViewCustomColumns gcc = new GridViewCustomColumns(nameKey);
            customTemp.ItemTemplate = gcc;
            GridView1.Columns.Add(customTemp);
        }
    }

    protected void Page_Load(object sender, EventArgs e)
    {

        if (!Page.IsPostBack)
        {
            int id = 0;
            Dictionary<string, string> data = new Dictionary<string, string>();
            data.Add("D0001", "公司1");
            data.Add("D0002", "公司2");
            data.Add("D0003", "公司3");
            data.Add("D0004", "公司4");
            DataTable Dt = new DataTable();
            DataRow dr;
            Dt.Columns.Add("Number", typeof(string));
            Dt.Columns.Add("Code", typeof(string));
            Dt.Columns.Add("Name", typeof(string));

            foreach (string skey in data.Keys)
            {
                dr = Dt.NewRow();
                dr[0] = id.ToString();
                dr[1] = skey;
                dr[2] = data[skey];
                Dt.Rows.Add(dr);
                id++;
            }
            this.GridView1.DataSource = Dt;
            this.GridView1.DataBind();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {

    }

类GridViewCustomColumns

C# code

public class GridViewCustomColumns : ITemplate
{
    string s_ColumnsName;
    public GridViewCustomColumns(string strName)
    {
        s_ColumnsName = strName;
    }

    void ITemplate.InstantiateIn(Control container)
    {
        Label lableName = new Label();
        lableName.ID = s_ColumnsName;
        lableName.DataBinding += new EventHandler(lableName_DataBinding);
        container.Controls.Add(lableName);
    }
    void lableName_DataBinding(object sender, EventArgs e)
    {
        Label lable = (Label)sender;
        GridViewRow container = (GridViewRow)lable.NamingContainer;
        DataRowView dl = (DataRowView)container.DataItem;
        lable.Text = dl[lable.ID].ToString();

    }
}