How to implement multi selection in a GridView

Dynamically add columns:

Elected">……Then add a js script.

function checkall(obj) Select all}} That's it, click on the checkbox in the middle of all to select all, of course, single selection of course.

Add template columns to the gridview, and drag a checkbox into them when designing the template columns. Use (checkbox) when referencing"checkbox1") to get the checkbox of the current row.

PS: Probably you need to traverse the gridview.

Let's start with the first method.

If you select FullRowSelect for the selectionmode of DataGridView, you can use Ctrl to select multiple rows.

Then, use a for loop to determine whether the selected of each row is true, and true indicates that the row is selected.

The second method is implemented with a checkbox.

If you set the ColumnType property of a column of DataGridView to DataGridViewCheckboxColumn, the column will automatically become a checkbox column.

Then, use a for loop to determine whether the value of the column in each row is true, and true indicates that the row is selected.

It seems that there is a property like multiselect and selectmode (it should mean cellselect, columnselect, rowselect, etc.), and your application should be multiselect to true and selectmode to rowselectYou can press Ctrl to select multiple and Shift to select.

If you don't need it, you can choose it directly.

Is this the effect? In the datagridview property bar, in the behavior bar, there is a property multiselect value changed to true, that's it, if it's not this effect, please describe it in detail, what effect do you want?

That's because the id of your second widget is checkbox1, and as long as the second widget is not selected, the else statement in the for loop will be executed.

There's a way to do this (only for winform):

1. Add a column to the source table of bound data datatable dt = ;

selected", ""));

selected"].defaultvalue = ;

dt;Add a column to the GridView of GridControl, the type is checkbox (you can select it by clicking new in the columnedit in the properties of the column), and set the fieldname to "selected" in the above **.

2. Select All.

private void checkedall(object sender,eventargs e)

int columnscount = ;

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

selected"], true);

3. Double-click the column header to select all.

private void gridview1_doubleclick(object sender, eventargs e)

point pt = ;

gridhitinfo info = ;

Determine which column header to use for.

checkedall(sender,e);

In the rowcreated event, determine the type of row, if it is a header.

Just add a checkbox html** into it.

Here you can change the header as much as you want...

After the gridview is generated, it is a table to the client

Just add a template column and you're done.