如何生成动态标签并使用列名和值作为文本

Question

Is there any way, if it is possible to dynamically generate the ASP.net page from code-behind.

Example:

ASP.net:

<div class="hidOverflow setFloatL smallPadLeft" style="width: 45%" runat="server" id="dvLeft">
</div>
<div class="hidOverflow setFloatL smallPadLeft" style="width: 45%" runat="server" id="dvRight">
</div>

Code-behind:

using (SqlConnection conn = new SqlConnection(gloString))
{
    try
    {
        strQuery = @"";

        SqlDataAdapter da = new SqlDataAdapter(strQuery, conn);

        DataSet myDataSet = new DataSet();
        da.Fill(myDataSet);

        //dynamically generate label with the SQL column name as the Text
        //dynamically generate label with the SQL column value as the text
        //<div class="hidOverflow smallPad">
            //<div class="setFloatL halfWidth vertAlignT">
                //<span class="profileLabel">{SQL COLUMN NAME}</span>
            //</div>
            //<div class="setFloatL vertAlignT">
                //<asp:Label ID="lbl1" ClientIDMode="Static" runat="server" Text="{SQL COLUMN VALUE}"></asp:Label>
            //</div>
        //</div>
        //.. more .. stop at the 1/2 mark of the count for the dataset and add it to the "dvLeft" div

        // STOP...

        //dynamically generate label with the SQL column name as the Text
        //dynamically generate label with the SQL column value as the text
        //<div class="hidOverflow smallPad">
            //<div class="setFloatL halfWidth vertAlignT">
                //<span class="profileLabel">{SQL COLUMN NAME}</span>
            //</div>
            //<div class="setFloatL vertAlignT">
                //<asp:Label ID="lbl1" ClientIDMode="Static" runat="server" Text="{SQL COLUMN VALUE}"></asp:Label>
            //</div>
        //</div>
        //.. more .. continue from the 1/2 mark of the count for the dataset and add it to the "dvRight" div
    }
    catch (SqlException)
    {
    }
}

I am looking to make it dynamic so all I have to do is change the SQL query and the labels will be generated accordingly.

I can most likely use a asp:Repeater control to achieve it?

Answer 1

You could try binding the repeater to the Datatable ColumnCollection:

private DataTable _dataTable;

public void LoadRepeater()
{
    //load dataset
    _dataTable = myDataSet.Tables[0];
    repeater.DataSource = _dataTable.Columns;
    repeater.DataBind();
}

public string GetColumnValue(string columnName)
{
    return _dataTable.Rows[0][columnName].ToString();
}

Then on the repeater:

<ItemTemplate>
   <div class="hidOverflow smallPad">
        <div class="setFloatL halfWidth vertAlignT">
            <span class="profileLabel"><%# Eval("ColumnName") %></span>
        </div>
        <div class="setFloatL vertAlignT">
            <asp:Label ID="lbl2" ClientIDMode="Static" runat="server" Text='<%# GetColumnValue(Eval("ColumnName")) %>'></asp:Label>
        </div>
  </div>
</ItemTemplate>

This will only work if you have a single row on your DataTable though.

If you have more Rows, you may have to include an additional repeater for the row dimension.

------------------------------------------------------------------

To Split the columns, you could do something like this (untested):

private void LoadRepeater()
{
    //load dataset
    _dataTable = myDataSet.Tables[0];
    int columnCount = _dataTable.Columns.Count;
    int half = (int)columnCount/2;

    var columnCollection = _dataTable.Columns.OfType<DataColumn>();
    var firstHalfColumns = columnCollection.Take(half);
    var secondHalfColumns = columnCollection.Skip(half);

    repeater1.DataSource = firstHalfColumns;
    repeater1.DataBind();

    repeater2.DataSource = secondHalfColumns;
    repeater2.DataBind();
}