Question
I have the following code, which adds rowspan to a datatable in an html string, but I want it not to receive as a parameter a datatable, but instead to receive as a parameter an html string in C#.
protected void Page_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("Subject");
dt.Columns.Add("Code");
dt.Columns.Add("Test");
dt.Columns.Add("Class");
dt.Rows.Add("Math", "9", "ABC", "D1");
dt.Rows.Add("Math", "9", "ABD", "D2");
dt.Rows.Add("Math", "9", "ABE", "D3");
dt.Rows.Add("Math", "9", "ABF", "D4");
dt.Rows.Add("Science", "91", "ABG", "D1");
dt.Rows.Add("Science", "91", "ABH", "D2");
dt.Rows.Add("Science", "91", "ABI", "D3");
dt.Rows.Add("English", "191", "ABJ", "D1");
Label1.Text = ConvertDataTableToHTML(dt);
}
public static string ConvertDataTableToHTML(DataTable dt)
{
string html = "<table border=1>";
//add header row
html += "<tr>";
for (int i = 0; i < dt.Columns.Count; i++)
{
html += "<td>" + dt.Columns[i].ColumnName + "</td>";
}
html += "</tr>";
//add rows
string sub = "";
for (int i = 0; i < dt.Rows.Count; i++)
{
html += "<tr>";
int count = dt.Select("Subject ='" + dt.Rows[i][0].ToString() + "'").Count();
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j < 2)
{
if (sub != dt.Rows[i][0].ToString())
{
html += "<td rowspan='" + count + "'>" + dt.Rows[i][j].ToString() + "</td>";
}
continue;
}
html += "<td>" + dt.Rows[i][j].ToString() + "</td>";
}
sub = dt.Rows[i][0].ToString();
html += "</tr>";
}
html += "</table>";
return html;
}
This is the result that I hope
Popular Answer
There are a few things wrong with the code, and a few ways you can improve your code:
<table border=1>is missing the quotes around the1. It should be<table border='1'>.- You are missing the
<thead>and<tbody>tags around the row tags. - Instead of constantly using
+=, use aStringBuilder. - To make your code cleaner, you can change some of your
forloops toforeachloops.
Your code should be changed to something like this:
public static string ConvertDataTableToHTML(DataTable dt)
{
StringBuilder builder = new StringBuilder();
//add header row
builder.Append("<table border='1'><thead><tr>");
foreach (DataColumn col in dt.Columns)
{
builder.Append("<td>");
builder.Append(col.ColumnName);
builder.Append("</td>");
}
builder.Append("</tr></thead><tbody>");
//add rows
string sub = "";
...
builder.Append("</tbody></table>");
return builder.ToString();
}
(Just apply the same concepts to the middle code that I removed.)
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