Get the Dynamic table data from gui in selenium webDriver - selenium-webdriver

Question

I am working on a web based Application that I am testing with Selenium. On one page the content is dynamically loaded in table. I want to get the Table data, i am geting a "org.openqa.selenium.NullPointerElementException" in this line.
WebElement table = log.driver.findElement(By.xpath(tableXpath));
I tried the following complete code.
public int selectfromtable(String tableXpath, String CompareValue, int columnnumber) throws Exception {
WebElement table = log.driver.findElement(By.xpath(tableXpath));
List<WebElement> rows = table.findElements(By.tagName("tr"));
int flag = 0;
for (WebElement row : rows) {
List<WebElement> cells = row.findElements(By.tagName("td"));
if (!cells.isEmpty() && cells.get(columnnumber).getText().equals(CompareValue)) {
flag = 1;
Thread.sleep(1000);
break;
} else {
Thread.sleep(2000);
flag = 0;
}
}
return flag;
}
I am calling the above method like
String tableXpath = ".//*[#id='event_list']/form/div[1]/table/tbody/tr/td/div/table";
selectfromtable(tableXpath, eventType, 3);
my html page is like
<table width="100%">
<tbody style="overflow: auto; background-color: #FFFFFF">
<tr class="trOdd">
<td width="2%" align="center">
<td width="20%" align="center"> Account </td>
<td width="20%" align="center"> Enter Collection </td>
<td width="20%" align="center">
<td width="20%" align="center"> 10 </td>
<td width="20%" align="center"> 1 </td>
</tr>
</tbody>
<tbody style="overflow: auto; background-color: #FFFFFF">
<tr class="trEven">
<td width="2%" align="center">
<td width="20%" align="center"> Account </td>
<td width="20%" align="center"> Resolved From Collection </td>
<td width="20%" align="center">
<td width="20%" align="center"> 10 </td>
<td width="20%" align="center"> 1 </td>
</tr>
</tbody>
</table>

Answer 1

My solution for similar case - I wanted to get a row number from table, which given column contains specific text.
// Method searches in given column of a table and return number of row where
// exactly first value is spotted (title row counts as 0 row and is
// skipped). If no value is found then 0 is returned. Given column number
// starts with 1.
public Integer getTableRowNumberWithValue(String tableId, String value,
Integer columnNumber) {
WebElement table = getDriver().findElement(By.id(tableId));
List<WebElement> rows = table.findElements(By.tagName("tr"));
int j = 0;
int i = 0;
for (WebElement row : rows) {
// Skip title row which counts as 0 row.
if (i > 0) {
if (row.findElements(By.tagName("td")).get(columnNumber - 1)
.getText().equals(value)) {
j = i;
break;
}
}
i++;
}
return j;
}

Answer 2

I had the similar issue. The solution I found was use the method and xpath together.
public void theSearch(String value) throws Exception {
String xpathExpression = "//*[starts-with(#id,'searchResultsTable:')]";
List<WebElement> elementTable= state.getDriver().findElements(By.xpath(xpathExpression));
for (WebElement listofElement : elementTable) {
String theElement= listofElement.getText();
if (theElement.contains(value)) {
Assert.assertEquals(value, theElement);
// System.out.println("The Expected Value " + value + " Equals the actual " + theElement);;
}
}
}