Tagged by 'datatable'

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    Simple Way To Use A DataTable

    When I normally create a datatable, I use quite a few lines of code just to add columns and input data into my DataTable.  But recently I have been using the following method use a DataTable in my code. The following function validates RadionButtonLists that I have in my page by passing the RadioButtonList size (rblSize) and RadioButtonList name (rblName).

    //Function: Validate RadioButtonList for each question group
    bool GroupValidateRBL(int rblSize, string rblName)
        bool validateOutput = true;
        int counter = 1;
        //Create DataTable object
        DataTable dt = new DataTable();
        //Add columns to DataTable
        while (counter <= rblSize)
            ContentPlaceHolder cph = (ContentPlaceHolder)Page.Master.FindControl("ContentPlaceHolder1");
            RadioButtonList rbl = (RadioButtonList)cph.FindControl(rblName + counter);
           //Add Rows to Datatable
           dt.Rows.Add(new string[] { counter.ToString(), rblName, rbl.SelectedIndex.ToString() });
        //Iterate through all rows in the DataTable to find all RadioButtonLists that have not been selected
        foreach (DataRow dr in dt.Rows)
            if (Convert.ToInt32(dr["Checked"]) == -1)
                validateOutput = false;
       return validateOutput;

    The DataTable in the function above stores a list of RadioButtonList entries and then iterates through each row in the DataTable to see if they have been selected. The data is entered into the DataTable by the following line:

    dt.Rows.Add(new string[] { counter.ToString(), rblName, rbl.SelectedIndex.ToString() });