The namespace was part of the XML element qualified name. We need to register that namespace. Most times you don't have to write the namespace URI literal string, it is already provided by XmlDocument.
If the namespace is not present with the namespace manager XmlNamespaceManager , you have to register it with the namespace prefix.
We add x:filterColumn node. As discussed before, the colId attribute is calculated from the start of the auto filter table, not from A column. So far we only preselected the filters but didn't hide the rows that need to be hidden. We have to iterate across all the rows that do not match any of the filters and manually hide them ExcelWorksheet. Row rowIndex. All the order year cells under column D, excluding the header cell at D2 , and their cell values.
Determine for each cell if its value is not one of the possible filters. If it is not, that cell's row should be hidden. If we include Blanks filter, we have to remove all the rows with empty cell values from our list of hidden rows. Due to merge cells, we have to iterate from the bottom row to the top row.
If we hide the first row of a merged cell, it will hide all the rows that are included in that cell. You may encounter a situation which you may not be able to utilize XmlDocument. There is no easy answer except to search for it on the web or go through the whole process of finding out how Excel does it. However, I do want to list here three namespaces that we are going to use in this article.
We already encountered that. No professional excel is complete without a chart or two. In this chapter and the next one we are going to add a column chart and a pie chart. With your own work, you may not need these exact type of charts. However, the chart modifications and the principle work that we are going to do is just the same for all charts. EPPlus has quite extensive abilities when it comes to charts but it doesn't implement everything. For every worksheet territory group , we would like to add a column clustered chart to compare the revenues between territories during time.
The bars are the territories in the territory group, the X axis is the months and the Y axis is the revenues. For each territory group we create a new worksheet and start to build the table. The main focus will be when we reach the territories total rows. Add the chart to the worksheet with ExcelWorksheet.
The return type of this method is the base class of all charts ExcelChart , but every type of chart has its own special properties and they are implemented within their own types - again, all inherit from ExcelChart - so it is important that you cast it down the inheritance tree. In this case we create eChartType. ColumnClustered chart type and cast it to ExcelBarChart.
The interesting property of this type is ExcelBarChart. GapWidth which determines the size of the gap between two adjacent bars. The code below creates the chart and sets its appearance. It is pretty straightforward but I would like to focus on the display unit of the Y axis.
If we don't set the display unit, Excel will set the Y values at steps of , So, the values will be 0; ,; ,00; It doesn't look appealing. By setting the display unit to a , Excel will divide each Y value by , thus removing the last three zeroes of each value. By adding the letter "K" to the Y value, we give out an indication that the Y values are in fact multiples of For every territory total row, we add it to the chart as a chart series.
In this case, the X axis is the months row Jan, Feb, Mar, Set the position of the chart below the table. This is only possible after the table is completely built and we know what is the last row of the table.
The child node that determines whether to show the data table keys or not - in our case the territory names - is ShowKeys class , its qualified name is c:showKeys. This XML node has a val attribute with possible values of 0 to hide and 1 to show the keys.
Here's the XML. And the C code. The method's chart argument is of type ExcelChart , that is the base class for all chart types, meaning, this code is not limited to any specific type of chart. This 3D pie chart shows what percentage of the total revenues each territory constitutes. As we did with the previous chart, we are going to do as much as we can with EPPlus and then embellish it, using Open XML, by adding some shadow to it, make it a metal material and make its bevels edges rounded.
That way the chart won't look dull. The sum revenues are located in the total column the last column of the territories total rows. Because we only need just one data serie for this chart, we will register the starting row index territoryNameFromRowIndex and the ending row index territoryNameToRowIndex of the territories total rows before and after they are built.
As mention before, this chart has only one data serie, the total revenues of the territories. The interesting part is the ability to change the appearance of the serie itself. The returned instance of ExcelPieChartSerie lets you to change the appearance of the data labels content, position and to change the distance between the pies by setting the data member Explosion to a specific percentage.
So, 1 cm is equals to EMUs. There are some very insightful explanations why this unit was chosen in this article Why EMUs? I'll try to give the bullet points. EMU is very small compare to real life measurement units cm, inch , thus allow an integer arithmetic avoids fractions. It is divisible by multiple of divisors 2, 3, 4, 5, 6, 8, 9, 12, 18, 24, 32, 36, 72, 96, so there are a lot of conversion possibilities from various measurement units that are not cm and inch.
Any fractions, caused when converting from one measurement unit to EMUs, are small enough to be redundant. We are going to use these constants to convert various values, given to us by points or inches, to EMU values.
This is the mathematical explanation how these values came about. A modern screen monitor is set to a default display of 96 ppi. That is also equals to 72 dpi. There is a nice explanation and a bit of history why it is like that in this Wikipedia entry Dots per inch.
When you are prompted to enter an angle or a percentage in Excel program, you will usually enter a whole number in the text box.
But these values are expressed differently in Open XML. One of the key goals, for the people who designed Open XML, is to express numeric values, in the XML, as integers and not as fractions. How can that be achieved for angles? Surely the user can enter any number between 0 degrees and degrees with any accuracy read: fraction that he wants. The solution to this problem is to limit the allowed precision of an angle. Let's look at some examples. The same goes for percentage.
It is important to note that these are not universal precisions across Open XML. For every element, you'll need to consult the documentation to find out what the precision of the element type.
The prefix "ST" means "simple type". Next, we add shadow beneath the chart. I think it gives the chart some extra depth on top of the 3D pies. Before we even start to code, we need to pin down the actual values of all the shadow parameters. The best place to do that is of course Excel program. Open the file that you generated so far and edit the serie shadow. Make sure to take note of all the parameters and their values. The shadow properties are related to a chart serie, so first we need to pin that serie down.
That will be the entry point to the whole XML. As with the previous chart, we start from PlotArea class. This class lists all kinds of chart types as child XML descendents, among other things, and since our chart is a 3D pie chart, we move on to Pie3DChart class. The shadow properties are specific to a chart serie, they are not global of the whole chart see the image above , so the next XML node is PieChartSeries class.
The XML node that we are looking for is ChartShapeProperties class , this is where the shadow properties will be, but before we continue, we need to make sure that we pick the correct serie out of all the chart series.
In our case, we only added one serie to the chart so there isn't much choice here, but I would like to generalize the code a little bit and pick a chart serie based on a index parameter. One of the child XML nodes is Index class. This XML simply holds the index of the serie among all the chart series. In plain words, this XPath picks PieChartSeries class c:ser that has a child Index class c:idx which has an attribute val val with a value of serieIndex.
If any of this goes over your head, you need to brush on your XPath. Here's a quick peek to the C code. The xml node ChartShapeProperties class has several child nodes and each of them define a different visual aspect of the chart such as filling colors, gradients, outline. One of these effects is OuterShadow class and this one defines the chart outer shadow. If we take a look at the XML so far, we can see that we are actually using two different namespaces.
The "c" namespace is the chart namespace and the "a" namespace is the schema namespace. EffectList class is not specific to charts, it can be used in other objects that involve drawing, which is why it doesn't exist under the "c" chart namespace. The OuterShadow class has sx and sy attributes that are the horizontal and vertical scaling factors. The attribute blurRad sets the blur radius of the shadow, in our case it is 8 points.
The attribute dist sets how far to offset the shadow, in our case it is 25 points. The attribute dir sets the direction to offset the shadow, in our case it is an angle of 90 degrees. We still need to set the color and the transparency. The val attribute is the Hex value of the color. The Alpha class sets the opacity of the color in percentages. That's it for the XML.
Now for the implementation. EPPlus has no dependencies other than. When working with EPPlus you need something to keep in mind: Cell addresses, number formats and formulas are culture-insensitive, meaning things might look a little bit different when you write your code. The AsDataSet extension method is a convenient helper for quickly getting the data, but is not always available or desirable to use.
ExcelDataReader implements the System. It can be used by any. Spreadsheet is a. Spreadsheet requires only. Join ",", columns. TableName ; stringBuilder. Append columnNamesCommaSeparated ; stringBuilder. Append questionmarkCommaSeparated ; stringBuilder. Append " " ; return stringBuilder. ReferenceEquals dataRow. Linq; using System. Text; using System. SpreadSheet; using System. Drawing; using System. Collections; using System. InteropServices; using System.
SaveAs fileFullName, excel. Show ex. Malek Tubaisaht Malek Tubaisaht 13 13 silver badges 13 13 bronze badges. Add prop. Name, Nullable. GetUnderlyingType prop. PropertyType ; if prop. Attributes[typeof FGMS. ReportHeaderAttribute ]! Add GetColumnHeader prop , Nullable.
NewRow ; table. GetValue item?? Value; if prop. ReportHeaderAttribute prop. ReportHeaderAttribute ]. Open ; result. Melu Melu 1, 3 3 gold badges 12 12 silver badges 12 12 bronze badges. Like for example foreach of my 1 thousand tables do this. Adding the report header attribute is not on the fly - a lot of coding there and that before even working on the real work.
Not knocking your solution - just pointing out that the sloth principle is not utilized here as this solution adds the step of creating dto's and then compiling.. I should state - I like that you used the generics. First ; template. AddVariable cust ; template. SaveAs outputFile ;. Private tmr As System. Add Dim xlSheet As Excel. Sheets 1 , Excel. Range "A1". Collect ', by unknown reason, doesn't help here. Tick, Sub GC.
Collect GC. Dispose End Sub tmr. FromSeconds 2. TotalMilliseconds tmr. Start End Sub. JohnyL JohnyL 6, 2 2 gold badges 17 17 silver badges 37 37 bronze badges. GetFolderPath Environment. Show this, "Izbran ni noben naslov! ActiveSheet; Excel. Cells[3, 1] , Range Worksheet. Cells[1, 1] ; TitleRange. Cells[RowShift, 2] , Range Worksheet.
Cells[RowShift, 12] ; HeaderRange. Adephx Adephx 10 10 bronze badges. Show ; dgv. GetClipboardContent ; frm. Hide ; dgv. ClearSelection ; if obj! Range destWsh. Cells[2, 1]; rng. Select ; destWsh. Davy C Davy C 3 3 silver badges 16 16 bronze badges. I wrote a simple function for exporting my query result as excel sheet I wrote it for but can be used in windows application with minor changes : using ClosedXML.
DataTable "buffer" ; foreach string col in columnMap. Add rowData. Add dtDataBuffer, sheetName ; worksheet. Center; worksheet. AdjustToContents ; workbook. The Overflow Blog.
Podcast what if you could invest in your favorite developer? Who owns this outage? The Apache POI library provides two implementations for reading excel files: xml. Files - operations on file content. Here your program will start writing content from the beginning of the file.
While there are some libraries, they are generally less mature and have a smaller feature set How to Install R Packages. Step 1: The file is opened as read-only and added to the file notification list.
Right click on the Excel Source and select Edit as shown below. Or you can choose the option Refresh Data when opening the file.
NET framework, combines an easy to use and powerful features. Click Connect a Device to connect Excel to the microcontroller. Every line ends with an end-of-line marker LineEnding. Excel Read csv, set UTF-8 as default for all csv files. Pandas converts this to the DataFrame structure, which is a tabular like structure. IXL is the world's most popular subscription-based learning site for K— Reading a CSV File.
Word Report Templates. Generally data is read from a file in the standard way, line-by-line and from left to right. Below steps should be followed. Repeat step 3 and 4 to write more data. Write contents to output stream. In this Selenium tutorial, we are going to learn "How to read and write data from Excel File".
First, we declare a variable called myFile of type String, an object called rng of type Range, a variable called Add the Spire. This site contains pointers to the best information available about working with Excel files in the Python programming language. The library was written with the following goals in mind:Read Excel File. Create a sheet in workbook. It really helps amateur programmers learn. Click the class name for the assignment you wish to access.
You can store strings in this type of file, but also numbers which can be formatted in different ways. To make things a bit quicker, you can actually navigate to the correct folder and open the file in a single command. The file notification list stores files that could only be opened in read-only mode. One line in the CSV file is to be skipped:! Once you selected the desired Excel file, you can see the sheet data and the available sheets in MS Excel file format support.
We help safeguard that data and protect your privacy by using industry-leading technology and practices. For the first time, the code implodes the column name array to print the Excel header.
Close output stream, close file. As per your description, since you mention you want to open csv file encoded with UTF-8 without using import data.
Read the Excel file in C with the help of the code below. StartsWith ". TryGetValue extension, out mime? Generic ;. Linq ;. Value , mapping. Key ;. TryGetValue extension , out mime? TryGetValue mimeType , out extension.
GetType "System. Instance BindingFlags. Static BindingFlags.
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