Question: i have a quick question i'm trying to make an application but i've faced a problem, i want to assign data to a button then pass that data to datagridview when the button is clicked ex.

[![enter image description here](https://i.stack.imgur.com/5T3di.png)](https://i.stack.imgur.com/5T3di.png)

```
private void TeaButton_Click(object sender, EventArgs e)
        {
            sales.OrderDataGridView.Rows.Add(1, "Tea", 5.0);
        }

```

i expected it to pass the values inside the parentheses to the data grid view, but it returned a null reference error, the reason was "sales." it was returning null value, but i don't know any other way beside this .

Answer: 
Add the `max-width` property with the value of `{n}ch`. For example: `max-width: 100ch`. Then, apply `white-space: nowrap`, and `overflow: hidden` to remove the overflow characters. In order to add some dots at the end, add the `text-overflow: ellipsis` property.

Any character after the value you defined will be removed.

```css
p {
  max-width: 30ch;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
```

```html
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore</p>
```

---

If you want to limit the number of lines, you can use the `line-clamp` properties instead of setting the number of characters (`max-width: {n}ch`):

```css
display: -webkit-box;
   -webkit-line-clamp: 3; /*   Set the number of lines here  */
   -webkit-box-orient: vertical;

```

Example:

```css
div {
  max-width: 100px;
}

p {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
```

```html
<div>
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore</p>
</div>
```
Just do it with JS based on the value of the string. In base JS you can do something like this. In react you can do the same but in a useEffect, then store the string (truncated or not) as a state value.

The example bellow will truncate a string that is > 20 characters long. To change that, just alter the two 20s to something else, maybe even put the truncate length as a param of the function.

```
const truncateString = (string) => {
  if (string.length > 20) {
    const truncatedString = `${string.slice(0, 20)}...`;
    setStringSomewhere(truncatedString)
  } else setStringSomewhere(string);
}

```