我看过很多变化,对如何解决这三个问题非常困惑.
我收到这个奇怪的错误...我的数据库中的主键是'DocumentID'所以我知道这不是问题.我正在尝试选择,编辑和删除gridview按钮,但我需要正确设置datakeynames才能使用它们.有任何想法吗？
<asp:GridView ID="GridView1" runat="server" DataSourceID="sdsDocuments" EnableModelValidation="True"
SelectedIndex="0" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" DataKeyNames="DocumentID, DocumentTitle, DocumentBody">
<Columns>
<asp:BoundField DataField="DocumentID" HeaderText="DocumentID" ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="DocumentTitle" HeaderText="DocumentTitle" SortExpression="Title" />
<asp:BoundField DataField="DocumentBody" HeaderText="DocumentBody" SortExpression="Body" />
<asp:CommandField ShowSelectButton="True" ShowDeleteButton="True" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="sdsDocuments" runat="server" ConnectionString="<%$ ConnectionStrings:blcDocumentationConnectionString %>"
SelectCommand="SELECT [DocumentTitle], [DocumentBody] FROM [tblDocument]" />
这是堆栈跟踪......
[HttpException (0x80004005): DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'DocumentID'.]
System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +8672869
System.Web.UI.WebControls.GridView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +2178
System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +57
System.Web.UI.WebControls.GridView.PerformDataBinding(IEnumerable data) +14
System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +114
System.Web.UI.DataSourceView.Select(DataSourceSelectArguments …//for( unsigned int i=0; i < c.size(); i++ ) tolower( c[i] );
for_each( c.begin(), c.end(), tolower );
我试图使用for_each循环代替for循环进行赋值.
我不确定为什么我收到此错误消息:
In function âvoid clean_entry(const std::string&, std::string&)â:
prog4.cc:62:40: error: no matching function for call to âfor_each(std::basic_string<char>::iterator, std::basic_string<char>::iterator, <unresolved overloaded function type>)â
void GameBoard::enterShips()
{
char location[1];
int ships = 0;
int count = 1;
while(ships < NUM_SHIPS)
{
cout << "Enter a location for Ship " << count << ": ";
cin >> location;
cout << endl;
Grid[location[0]][location[1]] = SHIP;
ships++;
count++;
}
}
我在写一个战舰游戏.我有电路板布局工作,计算机随机生成船只.现在我正在研究这种方法来提示用户输入船只的坐标当我运行程序时,它允许我输入5艘船.当我进入第6艘船时,它给了我这个错误.
变量位置周围的堆栈已损坏.
我在网上寻找答案,但没有找到任何独家的答案.
任何帮助,将不胜感激.
我正在写一个简短的程序来排序整数数组.我无法打开输入文件"prog1.d".分配要求在程序目录中创建一个符号链接,在创建对象和可执行文件后,我们按如下方式调用程序...
prog1.exe < prog1.d &> prog1.out
我知道我的冒泡排序正常有效,因为我使用了自己的测试'txt'文件.
作业说:
你的程序从stdin获取随机整数并将它们放在一个数组中,按升序对数组中的整数进行排序,然后在stdout上显示数组的内容.
如何使用'cin'读取文件直到EOF并将整数添加到我的数组a []？
到目前为止,这是我的代码:
int main( int argc, char * argv[] )
{
int a[SIZE];
for ( int i=1; i<argc; i++)
{
ifstream inFile; // declare stream
inFile.open( argv[i] ); // open file
// if file fails to open...
if( inFile.fail() )
{
cout << "The file has failed to open";
exit(-1);
}
// read int's & place into array a[]
for(int i=0; !inFile.eof(); i++)
{
inFile >> a[i];
}
inFile.close(); // …void GameBoard::print(const GameBoard& computerBoard)
{
Grid[0][0] = '1';
Grid[0][1] = '2';
Grid[1][0] = '3';
int i, j;
int sides = SIZE;
cout << " Your bombs: Your navy:" << endl << endl;
for(i=0; i<SIZE; i++)
{
// prints your bombs
cout << sides << " ";
for(j=0; j<SIZE; j++)
{
cout << computerBoard.Grid[i][j] << " ";
}
cout << " ";
// prints your ships
cout << sides << " ";
for(j=0; j<SIZE; j++)
{
cout << Grid[i][j] << " …我希望能够将文件上传到我的服务器上.
我知道我的代码有效,我无法弄清楚路径名称是怎么回事,以及如何将其设置为网站目录.
这是我的c#
protected void ASPxUploadControl1_FileUploadComplete(object sender, DevExpress.Web.ASPxUploadControl.FileUploadCompleteEventArgs e)
{
string uploadFolder = "~/files/";
string fileName = e.UploadedFile.FileName;
e.UploadedFile.SaveAs(uploadFolder + fileName);
e.CallbackData = fileName;
}
这是我尝试上传文件时收到的错误消息
Could not find a part of the path 'C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\~\files\project_questionnaire.doc'.
我已经为uploadFolder尝试了一切..."../files""files /""/ files /"等.
任何帮助,将不胜感激!