How to delete the data of the selected checkbox companion in the datalist, thank you

The value of the label in the datalist is not recorded in the viewstate, so after postback, it must be found later.

But the checkbox can be found by selecting the checkbox, and you can also use hidden for each row to record, after postbacking, you don't have to rebind the datalist line to find the value you want.

Write a method to loop through foreach to get the selected checkbox, and bind the ID to the checkbox' runat="server" /

foreach (datalist item inif (ids !=

return ids;

Then call this method when you delete the time, you only need to delete from table where id in the sql statement

Hehe, I've always used a js to do this work, and the name of the method in the js is ok when you go to the source code. If you need it, send me the email.

The findcontrol method is the id of the control, which is unique, so your loop finds the same name every time"checkbox1"The same goes for the checkbox linkbutton.

checkbox chk = checkbox)"checkbox1");There is only 1 ID, and it is fixed. Of course, only one can be deleted.

Select:' />

Here's the backend logic**.

foreach (datalistitem item in loop data row}

In fact, it is to get so checkbox, and then iterate to see which ones are selected, if it is selected, get the id of that one, after traversing, you can get the id of all the selected records, and finally delete it with deleted from table where id in(1,3,5,6,7). Inside the parentheses is the id of the selected row

If you delete in bulk, a delete button is written in the event.

Iterate through all checkboxes and determine if checked

Then delete all the checked IDs with SQL statements.

All controls have a tag property of type object that can store any data, I don't know if you want to delete it in the foreground or in the background.

foreach(datalistitem i incheckbox chk="checkbox1") as checkbox

Then operate.

Rebind or redirect.

**There may be errors. Debug and debug by yourself.

I won't post the specific**, you can try to find the checkbox with findcontrol, judge whether it is a choice, and then execute the corresponding sql statement, it should be fine.

The 0checkbox control is bound to the keywords of the record and the autopost of the checkbox is set to true

1. Add the event handler change.

First, get the ID of the selected data, determine that checked is true or false, if it is true, save this ID, if the ID of the data you selected is 1, 2, 3, 4

Then delete the statement and write it like this:

delete from table where id in (1，2，3，4)

The resulting id can also be saved in an array, and then a for loop can be written, and the sql statement is added.

For example, string sql="delete from table where id in ("

for(int i=0;i< arr is that array.

Then the truncated character is stripped to remove the last comma, because there is an extra one.

Finally sql+="stands for backbrackets.

In fact, to put it bluntly, it is to collect the ID of the selected data and put it into SQL statements.

listlist = new list();

for (int i = 0; i < i++)

Then separate their IDs and delete them using SQL.

using ;

This one seems to be called generic, and I only know how to use it, but I haven't studied it specifically.

The method of binding the list in the page load event ** coats a sentence:

if(!ispostback)

js to judge.

function getallcheckbox(checkall) calls the function onclick= in the checkbox of all"getallcheckbox(this)"

In the checkbox of each row, name="id"

The checkbox in the datalist cannot use events like other checkboxes, it requires you to use the findcontrol method in the program to find the checkbox and manipulate it.

Just write SQL statements!