有效地检查DataTable中是否有任何单元格包含子字符串

bool containsSubstring = false;
int rowIndex = -1;
int colIndex = -1;

for (int i = 0; i < dataTable.Rows.Count; i++)
{
    for (int j = 0; j < dataTable.Columns.Count; j++)
    {
        string cellValue = dataTable.Rows[i][j].ToString();
        
        if (cellValue.IndexOf(substring) >= 0)
        {
            containsSubstring = true;
            rowIndex = i;
            colIndex = j;
            break;
        }
    }
    
    if (containsSubstring)
    {
        break;
    }
}

if (containsSubstring)
{
    Console.WriteLine("DataTable中存在包含子字符串的单元格。");
    Console.WriteLine("行号：" + rowIndex);
    Console.WriteLine("列号：" + colIndex);
}
else
{
    Console.WriteLine("DataTable中不存在包含子字符串的单元格。");
}