Question

我正在申请积分。我如何检查复选框是否被选中，如果它是如何添加10，如果没有选中，我希望它什么都不做。这是JavaScript。 JS

Width="{Binding ElementName=DatagridName, Path=CellsPanelActualWidth}"

这里是一个JSfiddle：https://jsfiddle.net/RandomRainbow7/Lm574foy/ 小提琴不会显示一个人，所以如果你想要硬编码，否则就是另一个html页面。

if (localStorage.getItem("studentList") === null) {
    localStorage.setItem("studentList", JSON.stringify([]));
}

studentList = JSON.parse(localStorage.getItem("studentList"));

function save() {
    newStudent = {
        "firstname": document.getElementById('sFirstName').value,
        "lastname": document.getElementById('sLastName').value,
        "studentnumber": document.getElementById('sNumber').value,
        "points": document.getElementById('sPoints').value
    };  

    studentList.push(newStudent);
    localStorage.setItem("studentList", JSON.stringify(studentList));
};
table = document.getElementById("attendance");
for (i = 0; i < studentList.length; i++) {
    row = table.insertRow(i + 1);
    cell1 = row.insertCell(0);
    cell2 = row.insertCell(1);
    cell3 = row.insertCell(2);
    cell4 = row.insertCell(3);
    cell5 = row.insertCell(4);

    cell1.innerHTML = studentList[i].firstname;
    cell2.innerHTML = studentList[i].lastname;
    cell3.innerHTML = studentList[i].studentnumber;
    cell4.innerHTML = studentList[i].points;
    cell5.innerHTML = "<input type=checkbox>";
}


function userName() { //this function takes values from the text box and stores them in objects

    var studentList = {
        studentNumber: document.getElementById("newUser").value + index,
        lastName: document.getElementById("newlName").value + index,
        firstName: document.getElementById("newfName").value + index

    };
}

Answer 1

您可以在json对象中存储“缺席”的信息以及学生的其他信息：

将其存储在save()功能：

中

newStudent = {
    "firstname": document.getElementById('sFirstName').value,
    "lastname": document.getElementById('sLastName').value,
    "studentnumber": document.getElementById('sNumber').value,
    "points": document.getElementById('sPoints').value,

    "absent": document.getElementById('sAbsent').checked
};

在表格的for-loop中阅读：

cell1.innerHTML = studentList[i].firstname;
cell2.innerHTML = studentList[i].lastname;
cell3.innerHTML = studentList[i].studentnumber;
cell4.innerHTML = studentList[i].points;

cell5.innerHTML = "<input type=checkbox" + (studentList[i].absent === true) ? "checked>" : ">";
}

将其写在<h1>Add A Student</h1>下的HTML中：

<input type="checkbox" id="sAbsent"></input>

如何检查是否选中了复选框

1 个答案: