转发器并在页面加载时向列和itemtemplate添加列

Question

我没有使用中继器比显示数据表中的数据更多.

我正在构建一个网格,其中显示了用户已分配的用户和角色列,显示了复选框(在下面显示为true/false,但它们是复选框).

恩.

| Rep名称|来电者|更接近|经理|超级用户|
| Bob | True | true | 假| 假|
| Tom | false | false | True | 真的

基本上用它来进行角色管理.

但是,角色可能会在以后更改,因此我希望将角色(标头和项目)动态加载到转发器中.

我不知道该怎么做或者甚至可能.

我想你抓住当前角色可能性的列表并将它们加载到headertemplate但我不确定如何匹配itemtemplate以及如何创建复选框并将它们放在itemtemplate中.

对不起,如果这是一个粗鲁的问题......我很感激任何建议!

我将获得的数据的数据示例...虽然我也将返回此处未显示的角色和用户的ID.

DataTable dt = new DataTable(); DataColumn dc = new DataColumn();

      dc.DataType = Type.GetType("System.String");
      dc.ColumnName = "RepName";
      dt.Columns.Add(dc);

      dc = new DataColumn(); 
      dc.DataType = Type.GetType("System.Boolean");
      dc.ColumnName = "Caller";
      dt.Columns.Add(dc);

      dc = new DataColumn();
      dc.DataType = Type.GetType("System.Boolean");
      dc.ColumnName = "closer";
      dt.Columns.Add(dc);

      dc = new DataColumn();
      dc.DataType = Type.GetType("System.Boolean");
      dc.ColumnName = "Admin";
      dt.Columns.Add(dc);

      dc = new DataColumn();
      dc.DataType = Type.GetType("System.Boolean");
      dc.ColumnName = "SuperUser";
      dt.Columns.Add(dc);


      DataRow row;

      row = dt.NewRow();

      row["RepName"] = "Joe";
      row["Caller"] = true;
      row["closer"] = false;
      row["Admin"] = true;
      row["SuperUser"] = false;
      dt.Rows.Add(row);

      row = dt.NewRow();

      row["RepName"] = "Bob";
      row["Caller"] = true;
      row["closer"] = false;
      row["Admin"] = true;
      row["SuperUser"] = false;
      dt.Rows.Add(row);


      row = dt.NewRow();

      row["RepName"] = "Tom";
      row["Caller"] = true;
      row["closer"] = false;
      row["Admin"] = true;
      row["SuperUser"] = false;
      dt.Rows.Add(row);

Answer 1

使用嵌套的Repeater:外部Repeater用于行,并且有一个HeaderTemplate和ItemTemplate,它们分别包含header和checkbox列的内部Repeater.像这样的东西:

<asp:Repeater runat="server" ID="rowRepeater" OnItemDataBound="rowRepeater_ItemBound">
    <HeaderTemplate>
        <table>                                
        <tr>
            <asp:Repeater runat="server" ID="headerRepeater">
                <ItemTemplate>
                    <th>
                        <%# Container.DataItem %>
                    </th>
                </ItemTemplate>
            </asp:Repeater>
        </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td><asp:Label runat="server" ID="lblUserName" Text='<%# Eval("Key") %>' /></td>
            <asp:Repeater runat="server" ID="columnRepeater">
                <ItemTemplate>
                    <td>
                        <asp:HiddenField runat="server" ID="hfRoleIndex" Value='<%# Container.ItemIndex %>' />
                        <asp:CheckBox runat="server" ID="cbColumnValue" Checked='<%# Container.DataItem %>' OnCheckedChanged="cbColumnValue_CheckedChanged" AutoPostBack="true" />
                    </td>
                </ItemTemplate>
            </asp:Repeater>
        </tr>
    </ItemTemplate>
    <FooterTemplate>
        </table>
    </FooterTemplate>
</asp:Repeater>

并在您的代码后面:

Dictionary<string, bool[]> userRoles = new Dictionary<string, bool[]>(){
    {"Bob", new bool[]{true,true,false,false}},
    {"Tim",new bool[]{false,false,true,true}},
    {"John",new bool[]{false,true,false,true}}
};

string[] headings = { "Rep Name", "Caller", "Closer", "Manager", "SuperUser" };

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        rowRepeater.DataSource = userRoles;
        rowRepeater.DataBind();
    }
}

protected void rowRepeater_ItemBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Header)
    {
        Repeater headerRepeater = e.Item.FindControl("headerRepeater") as Repeater;
        headerRepeater.DataSource = headings;
        headerRepeater.DataBind();
    }
    else if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Repeater columnRepeater = e.Item.FindControl("columnRepeater") as Repeater;
        columnRepeater.DataSource = ((KeyValuePair<string, bool[]>)e.Item.DataItem).Value;
        columnRepeater.DataBind();
    }
}

protected void cbColumnValue_CheckedChanged(object sender, EventArgs e)
{
    CheckBox cb = sender as CheckBox;
    HiddenField hf = cb.Parent.FindControl("hfRoleIndex") as HiddenField;
    int roleIndex = int.Parse(hf.Value); // now you have the column identifier

    Label lbl = cb.Parent.Parent.Parent.FindControl("lblUserName") as Label;
    string userName = lbl.Text; //now you have the row identifier

    //now you can update your data source
    userRoles[userName][roleIndex] = cb.Checked;
}