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Is this object-lifetime-extending-closure a C# compiler bug?
...ssibility of closures (legitimately) extending object-lifetimes when I ran into some extremely curious code-gen on the part of the C# compiler (4.0 if that matters).
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Import and Export Excel - What is the best library? [closed]
...native format that is convenient to you, write a prog. that uses EPPlus to convert to Excel, make that free. Make your main prog use that as default, but allow other "plugins", hey presto your real code is free from the GPL.
– user159335
Nov 3 '11 at 16:01
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Change Volley timeout duration
...et & ConnectionTImeout to 5 secs for all requests.
RetryPolicy is an interface where you need to implement your logic of how you want to retry a particular request when a timeout happens.
It deals with these three parameters
Timeout - Specifies Socket Timeout in millis per every retry attem...
【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
...nce reasons to use PanTo with numerical latitude and longitude rather than convert to the string representation for use with this property.设置显示在手机屏幕上的地图中心的坐标。值是一对由逗号分隔的十进制坐标，如42.359144, -71.093612，注意纬度在前，经度...
C# : 'is' keyword and checking for Not
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I like this but it doesn't seem to work right when introducing a variable, even though it should. if (a is TextReader reader == false) "should" work, but it won't let you use the variable in the true path saying it might not have been initialized.
– Dave...
remove nuget package restore from solution
.../migrating-to-automatic-package-restore
There is information there for converting with and without TFS.
David Ebbo also posted some information at http://blog.davidebbo.com/2014/01/the-right-way-to-restore-nuget-packages.html
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Merging dictionaries in C#
...you'll get a lookup which can have multiple values per key. You could then convert that to a dictionary:
var result = dictionaries.SelectMany(dict => dict)
.ToLookup(pair => pair.Key, pair => pair.Value)
.ToDictionary(group => group.Key,...
LAST_INSERT_ID() MySQL
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You could store the last insert id in a variable :
INSERT INTO table1 (title,userid) VALUES ('test', 1);
SET @last_id_in_table1 = LAST_INSERT_ID();
INSERT INTO table2 (parentid,otherid,userid) VALUES (@last_id_in_table1, 4, 1);
Or get the max id frm table1
INSERT INTO table1...
How to add a new row to datagridview programmatically
...w row first as it will include the columns you've created at design-time.
int rowId = dataGridView1.Rows.Add();
// Grab the new row!
DataGridViewRow row = dataGridView1.Rows[rowId];
// Add the data
row.Cells["Column1"].Value = "Value1";
row.Cells["Column2"].Value = "Value2";
// And that's it! Qu...
How to define an enum with string value?
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You can't - enum values have to be integral values. You can either use attributes to associate a string value with each enum value, or in this case if every separator is a single character you could just use the char value:
enum Separator
{
Comma = ',',
...