本文整理汇总了C#中System.Windows.Forms.ListView.ThrowIfNull方法的典型用法代码示例。如果您正苦于以下问题：C# ListView.ThrowIfNull方法的具体用法？C# ListView.ThrowIfNull怎么用？C# ListView.ThrowIfNull使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Forms.ListView的用法示例。
在下文中一共展示了ListView.ThrowIfNull方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: CreateCSV
/// <summary>
/// This method takes a list view and returns a multi-line string that represents the listview as a CSV (comma-delimited) file.
/// </summary>
/// <param name="listViewToExport">Thr listview to export.</param>
/// <param name="withUnit">if set to <c>true</c> listView is exported with unit column.</param>
/// <remarks>
/// For delimiter we use the semicolon in order to support decimal and thousand seperator in different cultures.
/// The major difference is that the list view assumes to contain units, so if the values in each column contain two values seperated by a space
/// and the second value is the same in every column (1 and beyond), the unit is seperated out and placed in column "2". This allows the
/// values to be imported into the spreadsheet software as a number, instead of a string enabling numerical analysis of the export.
/// </remarks>
/// <exception cref="System.ArgumentNullException">listViewToExport</exception>
public static void CreateCSV(ListView listViewToExport, bool withUnit = false)
{
listViewToExport.ThrowIfNull(nameof(listViewToExport));
using (SaveFileDialog saveFileDialog = new SaveFileDialog())
{
saveFileDialog.Filter = @"Comma Delimited Files (Semicolon) (*.csv)|*.csv";
if (saveFileDialog.ShowDialog() != DialogResult.OK)
return;
StringBuilder sb = new StringBuilder();
// Export the column headers
bool ignoreSemicolon = true;
for (int i = 0; i < listViewToExport.Columns.Count; i++)
{
ColumnHeader myColumn = listViewToExport.Columns[i];
sb.Append(MakeCSVString(myColumn.Text, ignoreSemicolon));
ignoreSemicolon = false;
if (i == 0 && withUnit)
sb.Append(MakeCSVString("Unit"));
}
sb.AppendLine();
for (int line = 0; line < listViewToExport.Items.Count; line++)
{
string[] elements = listViewToExport.Items[line].SubItems[1].Text.Split(" ".ToCharArray());
string unit = String.Empty;
if (withUnit)
{
// Determine if the items have a unit description
string possibleUnit = String.Join(" ", elements.Skip(1));
bool hasUnit = elements.Length > 1 &&
StaticProperties.AllProperties.Any(prop => prop.Unit == possibleUnit);
if (hasUnit)
unit = possibleUnit;
}
// Export the lines
ignoreSemicolon = true;
int maxElements = listViewToExport.Columns.Count;
if (listViewToExport.Items[line].SubItems.Count < maxElements)
maxElements = listViewToExport.Items[line].SubItems.Count;
for (int subitem = 0; subitem < maxElements; subitem++)
{
elements = listViewToExport.Items[line].SubItems[subitem].Text.Split(" ".ToCharArray());
// If the value is a number format it as so; as string otherwise
double number;
sb.Append(Double.TryParse(elements[0], out number)
? MakeCSVNumber(number.ToString(CultureConstants.DefaultCulture), ignoreSemicolon)
: MakeCSVString(listViewToExport.Items[line].SubItems[subitem].Text, ignoreSemicolon));
ignoreSemicolon = false;
if (subitem == 0 && withUnit)
sb.Append(MakeCSVString(unit));
}
sb.AppendLine();
}
File.WriteAllText(saveFileDialog.FileName, sb.ToString());
}
}