ASP.NET gridview复选框问题
我正在尝试在gridview中实现一个复选框，
这个复选框的作用是验证一条记录，
当按下这个验证按钮时，所有带有选中复选框的项目都会输入到数据库中
这是我的代码：
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView1.Rows)
{
CheckBox cbox = ((CheckBox)row.FindControl("Verify"));
if (cbox.Equals(true))
{
String DraftsText = ((TextBox)row.FindControl("numDrafts")).Text;
String TCtext = ((TextBox)row.FindControl("numTC")).Text;
if (row.RowType == DataControlRowType.DataRow)
{
//Header trs = new Header();
// GridView1.Rows[0].FindControl("numTC");
if (TCtext != "" && DraftsText != "")
{
// try
// {
string date = row.Cells[4].Text;
DateTime dateTime = Convert.ToDateTime(date);
string dateFormatted = dateTime.ToString("d-MMM-yy");
string unit = row.Cells[5].Text;
string currency = row.Cells[6].Text;
string totalFC = row.Cells[7].Text;
string totalDC = row.Cells[8].Text;
int d = Convert.ToInt32(DraftsText);
int tc = Convert.ToInt32(TCtext);
hdr = new Header(d, tc, dateFormatted, unit, currency, totalFC, totalDC);
hdr.InsertFCTC(hdr);
}
}
}
}
}
我可能会这样做错误的方式，但在 if (cbox.Equals(true)) 它给了我一个例外：对象引用未设置为对象的实例。
知道我能做什么来解决这个问题吗？
非常感谢
I am trying to implement a checkbox within gridview,
The job of this checkbox is to verify a record,
When this verify button is pressed, all items with a checked checkbox are inputted into the database
This is my code:
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView1.Rows)
{
CheckBox cbox = ((CheckBox)row.FindControl("Verify"));
if (cbox.Equals(true))
{
String DraftsText = ((TextBox)row.FindControl("numDrafts")).Text;
String TCtext = ((TextBox)row.FindControl("numTC")).Text;
if (row.RowType == DataControlRowType.DataRow)
{
//Header trs = new Header();
// GridView1.Rows[0].FindControl("numTC");
if (TCtext != "" && DraftsText != "")
{
// try
// {
string date = row.Cells[4].Text;
DateTime dateTime = Convert.ToDateTime(date);
string dateFormatted = dateTime.ToString("d-MMM-yy");
string unit = row.Cells[5].Text;
string currency = row.Cells[6].Text;
string totalFC = row.Cells[7].Text;
string totalDC = row.Cells[8].Text;
int d = Convert.ToInt32(DraftsText);
int tc = Convert.ToInt32(TCtext);
hdr = new Header(d, tc, dateFormatted, unit, currency, totalFC, totalDC);
hdr.InsertFCTC(hdr);
}
}
}
}
}
I might be going at this the wrong way but in the if (cbox.Equals(true))
its giving me an exception: Object reference not set to an instance of an object.
Any idea what i can do to solve this?
Many Thanks
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这个
if (cbox.Equals(true))应该是if (cbox.Checked)因为你的
cbox 是一个复选框对象，所以它不能用于比较，因此您必须使用cboxChecked属性，它将返回true/falseThis
if (cbox.Equals(true))should beif (cbox.Checked)Since your
cbox is a checkbox objectit can't be used to compare, so you have to use thecboxCheckedProperty, which will returntrue/false您收到 NullPointerException，因为未找到建议的复选框！或者直接转换为 CheckBox 类型的实例无法按预期工作。
You receive a NullPointerException because the suggested checkbox wasn't found! Or the direct cast into an instance of type CheckBox doesn't worked as expected.
将您的代码更改为类似以下内容并重试：
Change your code to something like this and retry: