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c# How to write in Microsoft Interop Word

I am writing my reports directly in microsoft word file, the problem is I cannot write a different text. It just override my other text.
Word.Application myWord = new Word.Application();
//create the document
Word.Document myDoc = myWord.Documents.Add();
//ADD PARAGRAPH
myDoc.Content.Text = "Identified Market/Visitors" + " " + "Museum (as a whole)" + " " + "Percentage" + " ";
myDoc.Content.Text = "2" + " " + "76)" + " " + "25% "+ " ";
saveFileDialog1.Filter = "Word Document|*.docx";
string path = saveFileDialog1.FileName;
myDoc.Close();
The second Content Text overrides the First Content Text.
How can I write another line of text?

The best way to generate docx is to use OpenXmlSDK.
The easiest way to write code is to create docx in word which looks like report you want and reverse Enginier C# code from docx using open xml sdk tools and not to reinvent the wheel.
Generated code for your text:
Body body1 = new Body();
Paragraph paragraph1 = new Paragraph(){ RsidParagraphAddition = "008B2DA9", RsidParagraphProperties = "008B2DA9", RsidRunAdditionDefault = "008B2DA9", ParagraphId = "769280AB", TextId = "395E2934" };
ParagraphProperties paragraphProperties1 = new ParagraphProperties();
Tabs tabs1 = new Tabs();
TabStop tabStop1 = new TabStop(){ Val = TabStopValues.Left, Position = 3686 };
TabStop tabStop2 = new TabStop(){ Val = TabStopValues.Left, Position = 6804 };
tabs1.Append(tabStop1);
tabs1.Append(tabStop2);
ParagraphMarkRunProperties paragraphMarkRunProperties1 = new ParagraphMarkRunProperties();
Languages languages1 = new Languages(){ Val = "en-US" };
paragraphMarkRunProperties1.Append(languages1);
paragraphProperties1.Append(tabs1);
paragraphProperties1.Append(paragraphMarkRunProperties1);
Run run1 = new Run(){ RsidRunProperties = "005F7E61" };
RunProperties runProperties1 = new RunProperties();
Languages languages2 = new Languages(){ Val = "en-US" };
runProperties1.Append(languages2);
Text text1 = new Text();
text1.Text = "Identified Market/Visitors";
run1.Append(runProperties1);
run1.Append(text1);
Run run2 = new Run();
RunProperties runProperties2 = new RunProperties();
Languages languages3 = new Languages(){ Val = "en-US" };
runProperties2.Append(languages3);
TabChar tabChar1 = new TabChar();
run2.Append(runProperties2);
run2.Append(tabChar1);
Run run3 = new Run(){ RsidRunProperties = "005F7E61" };
RunProperties runProperties3 = new RunProperties();
Languages languages4 = new Languages(){ Val = "en-US" };
runProperties3.Append(languages4);
Text text2 = new Text();
text2.Text = "Museum (as a whole)";
run3.Append(runProperties3);
run3.Append(text2);
Run run4 = new Run();
RunProperties runProperties4 = new RunProperties();
Languages languages5 = new Languages(){ Val = "en-US" };
runProperties4.Append(languages5);
TabChar tabChar2 = new TabChar();
run4.Append(runProperties4);
run4.Append(tabChar2);
Run run5 = new Run(){ RsidRunProperties = "005F7E61" };
RunProperties runProperties5 = new RunProperties();
Languages languages6 = new Languages(){ Val = "en-US" };
runProperties5.Append(languages6);
Text text3 = new Text();
text3.Text = "Percentage";
run5.Append(runProperties5);
run5.Append(text3);
paragraph1.Append(paragraphProperties1);
paragraph1.Append(run1);
paragraph1.Append(run2);
paragraph1.Append(run3);
paragraph1.Append(run4);
paragraph1.Append(run5);
Paragraph paragraph2 = new Paragraph(){ RsidParagraphMarkRevision = "008B2DA9", RsidParagraphAddition = "008B2DA9", RsidParagraphProperties = "008B2DA9", RsidRunAdditionDefault = "008B2DA9", ParagraphId = "6C5F87B4", TextId = "46169FF3" };
ParagraphProperties paragraphProperties2 = new ParagraphProperties();
Tabs tabs2 = new Tabs();
TabStop tabStop3 = new TabStop(){ Val = TabStopValues.Left, Position = 3686 };
TabStop tabStop4 = new TabStop(){ Val = TabStopValues.Left, Position = 6804 };
tabs2.Append(tabStop3);
tabs2.Append(tabStop4);
ParagraphMarkRunProperties paragraphMarkRunProperties2 = new ParagraphMarkRunProperties();
Languages languages7 = new Languages(){ Val = "en-US" };
paragraphMarkRunProperties2.Append(languages7);
paragraphProperties2.Append(tabs2);
paragraphProperties2.Append(paragraphMarkRunProperties2);
Run run6 = new Run();
RunProperties runProperties6 = new RunProperties();
Languages languages8 = new Languages(){ Val = "en-US" };
runProperties6.Append(languages8);
Text text4 = new Text();
text4.Text = "2";
run6.Append(runProperties6);
run6.Append(text4);
Run run7 = new Run();
RunProperties runProperties7 = new RunProperties();
Languages languages9 = new Languages(){ Val = "en-US" };
runProperties7.Append(languages9);
TabChar tabChar3 = new TabChar();
Text text5 = new Text();
text5.Text = "76";
run7.Append(runProperties7);
run7.Append(tabChar3);
run7.Append(text5);
Run run8 = new Run();
RunProperties runProperties8 = new RunProperties();
Languages languages10 = new Languages(){ Val = "en-US" };
runProperties8.Append(languages10);
TabChar tabChar4 = new TabChar();
Text text6 = new Text();
text6.Text = "25%";
run8.Append(runProperties8);
run8.Append(tabChar4);
run8.Append(text6);
paragraph2.Append(paragraphProperties2);
paragraph2.Append(run6);
paragraph2.Append(run7);
paragraph2.Append(run8);
Paragraph paragraph3 = new Paragraph(){ RsidParagraphMarkRevision = "005F7E61", RsidParagraphAddition = "00BA3985", RsidParagraphProperties = "005F7E61", RsidRunAdditionDefault = "008B2DA9", ParagraphId = "2562476B", TextId = "454E7663" };
ParagraphProperties paragraphProperties3 = new ParagraphProperties();
ParagraphMarkRunProperties paragraphMarkRunProperties3 = new ParagraphMarkRunProperties();
Languages languages11 = new Languages(){ Val = "en-US" };
paragraphMarkRunProperties3.Append(languages11);
paragraphProperties3.Append(paragraphMarkRunProperties3);
BookmarkStart bookmarkStart1 = new BookmarkStart(){ Name = "_GoBack", Id = "0" };
BookmarkEnd bookmarkEnd1 = new BookmarkEnd(){ Id = "0" };
paragraph3.Append(paragraphProperties3);
paragraph3.Append(bookmarkStart1);
paragraph3.Append(bookmarkEnd1);
SectionProperties sectionProperties1 = new SectionProperties(){ RsidRPr = "005F7E61", RsidR = "00BA3985" };
PageSize pageSize1 = new PageSize(){ Width = (UInt32Value)12240U, Height = (UInt32Value)15840U };
PageMargin pageMargin1 = new PageMargin(){ Top = 1440, Right = (UInt32Value)1440U, Bottom = 1440, Left = (UInt32Value)1440U, Header = (UInt32Value)720U, Footer = (UInt32Value)720U, Gutter = (UInt32Value)0U };
Columns columns1 = new Columns(){ Space = "720" };
DocGrid docGrid1 = new DocGrid(){ LinePitch = 360 };
sectionProperties1.Append(pageSize1);
sectionProperties1.Append(pageMargin1);
sectionProperties1.Append(columns1);
sectionProperties1.Append(docGrid1);
body1.Append(paragraph1);
body1.Append(paragraph2);
body1.Append(paragraph3);
body1.Append(sectionProperties1);
document1.Append(body1);
PS: Even though it's weird that you build table using string format. Use table in your docx from which you create C# code.

To start next sentence in a new line, just add newline ("\r\n" or Environment.NewLine) to the end of each text:
myDoc.Content.Text = "Identified Market/Visitors" + " " + "Museum (as a whole)" + " " + "Percentage" + " " + Environment.NewLine;
myDoc.Content.Text += "2" + " " + "76)" + " " + "25% "+ " " + Environment.NewLine;

Insert text at the start of a document in Word - openXML

I am using OpenXML to manipulate Microsoft Word files (.docx).
I am sending the Word files as memory stream, editing them and then send them back to browser so they open in client office program.
I want to insert text, approximatley 10 lines, at the start of a document which already got content. I am doing it like this;
using (var wordprocessingDocument = WordprocessingDocument.Open(mem, true))
{
Paragraph firstParagraph = wordprocessingDocument.MainDocumentPart.Document.Descendants<Paragraph>().First();
Run run1 = new Run();
Text text1 = new Text();
text1.Text = "Document type: ";
run1.Append(text1);
Run run2 = new Run();
Break break1 = new Break();
run2.Append(break1);
ProofError proofError1 = new ProofError() { Type = ProofingErrorValues.SpellStart };
Run run3 = new Run();
Text text2 = new Text();
text2.Text = "Document ID";
run3.Append(text2);
ProofError proofError2 = new ProofError() { Type = ProofingErrorValues.SpellEnd };
Run run4 = new Run();
Break break2 = new Break();
Text text3 = new Text();
text3.Text = "Document Title";
run4.Append(break2);
run4.Append(text3);
firstParagraph.Append(run1);
firstParagraph.Append(run2);
firstParagraph.Append(proofError1);
firstParagraph.Append(run3);
firstParagraph.Append(proofError2);
firstParagraph.Append(run4);
Paragraph paragraph3 = new Paragraph() { RsidParagraphAddition = "0068718C", RsidParagraphProperties = "0068718C", RsidRunAdditionDefault = "00E1050C" };
Run run5 = new Run();
Text text4 = new Text();
text4.Text = "A";
run5.Append(text4);
Run run6 = new Run() { RsidRunAddition = "00126F2D" };
Text text5 = new Text();
text5.Text = "tlet";
run6.Append(text5);
paragraph3.Append(run5);
paragraph3.Append(run6);
Paragraph paragraph4 = new Paragraph() { RsidParagraphMarkRevision = "0068718C", RsidParagraphAddition = "00E1050C", RsidParagraphProperties = "0068718C", RsidRunAdditionDefault = "00E1050C" };
BookmarkStart bookmarkStart1 = new BookmarkStart() { Name = "_GoBack", Id = "0" };
BookmarkEnd bookmarkEnd1 = new BookmarkEnd() { Id = "0" };
paragraph4.Append(bookmarkStart1);
paragraph4.Append(bookmarkEnd1);
SectionProperties sectionProperties1 = new SectionProperties() { RsidRPr = "0068718C", RsidR = "00E1050C", RsidSect = "000C7A63" };
}
My problem is that if I already got some text from the first line, then my text will be appended after the original text there. How can I push the original content some lines down, and insert my text above?

Use PrependChild instead of Append. Append will always insert at the end of the current element. So if you already have content in the first paragraph your append will put your text at the end of it. You can also insert your text as a new first paragraph by calling Document.PrependChild(firstParagraph)

The name SpaceProcessingModeValues does not exist in this context

In my ASP.net program i have a class to open a word document, find a boormark and insert a given text
The error i get is: the name SpaceProcessingModeValues does not exist in the current context.
using (WordprocessingDocument document = WordprocessingDocument.Open(strFileName, true))
{
MainDocumentPart mainPart = document.MainDocumentPart;
IEnumerable<BookmarkStart> res = from bm in mainPart.Document.Body.Descendants<BookmarkStart>()
where bm.Name == "strField"
select bm;
int x = 0;
BookmarkStart bookmark = res.SingleOrDefault();
if (bookmark != null)
{
OpenXmlElement parent = bookmark.Parent; // bookmark's parent element
var paragraph1 = new Paragraph {RsidParagraphAddition = "00023529", RsidRunAdditionDefault = "003E1BA6"};
var run1 = new Run();
var text1 = new Text("Text : "){ Space = SpaceProcessingModeValues.Preserve };
run1.Append(text1);
var bookmarkStart1 = new BookmarkStart {Name = "_GoBack", Id = 0};
var bookmarkEnd1 = new BookmarkEnd {Id = 0};
var run2 = new Run();
var text2 = new Text();
text2.Text = strGivenText;
run2.Append(text2);
paragraph1.Append(run1);
paragraph1.Append(bookmarkStart1);
paragraph1.Append(bookmarkEnd1);
paragraph1.Append(run2);
parent.InsertBeforeSelf(paragraph1);
}
// close saves all parts and closes the document
mainPart.Document.Save();
document.Close();
}

You need to add the references DocumentFormat.OpenXml namespace

How do I create a check box in C# using Open XML SDK

I would like to create a certain number of checkbox using Open XML SDK in C#. How would I do that?
Example:
(Checkbox) - Shoes
(Checkbox) - Shirt
The checkbox count also varies. I am reading a template document, then make edits to return. I have something like this so far:
string documentText;
using (StreamReader reader ...)
{
documentText = reader.ReadToEnd();
}
string addClothes = "";
Run newCheckBox = GenerateRun();
foreach(var item in ClothesList)
{
addClothes = item.clothing;
//MY DILEMMA
documentText = documentText.Replace("##clothing##", newCheckBox + addClothes + "NewLine");
}
public Run GenerateRun()
{
Run run1 = new Run() { RsidRunProperties = "004C0D9A", RsidRunAddition = "00850FA5" };
FieldCode fieldCode1 = new FieldCode() { Space = SpaceProcessingModeValues.Preserve };
fieldCode1.Text = " FORMCHECKBOX ";
run1.Append(fieldCode1);
return run1;
}

using the OpenXML SDK i think it goes something like this:
(raw copy/paste - the value of -1636166143 might be way off)
using w14 = DocumentFormat.OpenXml.Office2010.Word
SdtRun sdtRun1 = new SdtRun();
SdtProperties sdtProperties1 = new SdtProperties();
SdtId sdtId1 = new SdtId(){ Val = -1636166143 };
W14.SdtContentCheckBox sdtContentCheckBox1 = new W14.SdtContentCheckBox();
W14.Checked checked1 = new W14.Checked(){ Val = W14.OnOffValues.Zero };
W14.CheckedState checkedState1 = new W14.CheckedState(){ Font = "MS Gothic", Val = "2612" };
W14.UncheckedState uncheckedState1 = new W14.UncheckedState(){ Font = "MS Gothic", Val = "2610" };
sdtContentCheckBox1.Append(checked1);
sdtContentCheckBox1.Append(checkedState1);
sdtContentCheckBox1.Append(uncheckedState1);
sdtProperties1.Append(sdtId1);
sdtProperties1.Append(sdtContentCheckBox1);
SdtContentRun sdtContentRun1 = new SdtContentRun();
Run run1 = new Run();
RunProperties runProperties1 = new RunProperties();
RunFonts runFonts1 = new RunFonts(){ Hint = FontTypeHintValues.EastAsia, Ascii = "MS Gothic", HighAnsi = "MS Gothic", EastAsia = "MS Gothic" };
runProperties1.Append(runFonts1);
Text text1 = new Text();
text1.Text = "☐";
run1.Append(runProperties1);
run1.Append(text1);
sdtContentRun1.Append(run1);
Any text you want after the checkbox, comes after the above code

Open XML (Microsoft Word): C# Table Justification

How would I align my table in the middle of the word document in open xml?
Here is my code and I want to align the table in the middle.
Here is my code. I'm trying to use TableJustification, but it seems like its not working
using (WordprocessingDocument wordDoc = WordprocessingDocument.Create(filepath, WordprocessingDocumentType.Document))
{
MainDocumentPart mainPart = wordDoc.AddMainDocumentPart();
mainPart.Document = new Document();
Body body = mainPart.Document.AppendChild(new Body());
Run run = new Run();
// Goes through all of the forms
foreach (var form in forms)
{
Table table = new Table();
// Initialize all of the table properties
TableProperties tblProp = new TableProperties(
new TableBorders(
new TopBorder() { Val = new EnumValue<BorderValues>(BorderValues.BasicBlackSquares), Size = 16 },
new LeftBorder() { Val = new EnumValue<BorderValues>(BorderValues.BasicBlackSquares), Size = 16 },
new RightBorder() { Val = new EnumValue<BorderValues>(BorderValues.BasicBlackSquares), Size = 16 },
new BottomBorder() { Val = new EnumValue<BorderValues>(BorderValues.BasicBlackSquares), Size = 16 }
)
);
// Align the table to the center
TableJustification justs_center = new TableJustification() { Val = _____ };
table.AppendChild(justs_center);
table.AppendChild<TableProperties>(tblProp);
Paragraph para = body.AppendChild(new Paragraph());
Run run_header = para.AppendChild(new Run());
RunProperties runProps = run_header.AppendChild(new RunProperties(new Bold()));
string username = form.Username;
string proces_header = form.HeaderTitle;
run_header.AppendChild(new Text(proces_header + " | " + username));
for (int i = 0; i < form.FieldList.Count; i++)
{
if (!(form.FieldList[i].Token == "USR" || form.FieldList[i].Token == "SNT"))
{
TableRow tr = new TableRow();
TableCell header_cell = new TableCell();
header_cell.Append(new Paragraph(new Run(new Text(form.FieldList[i].Label + ": " + form.FieldList[i].Value))));
tr.Append(header_cell);
table.Append(tr);
}
}
wordDoc.MainDocumentPart.Document.Body.Append(table);
}
mainPart.Document.Save();
wordDoc.Close();
return "Success";
}
}

Table t = new Table(
new TableProperties(
...
new TableJustification() { Val = TableRowAlignmentValues.Center},
...),
new TableRow(...),
);

Trying to center the table with the accepted answer did not seem to work. I needed to apply the center justification to all of the rows as well
var t = new Table();
var tableProps = new TableProperties();
tableProps.TableJustification = new TableJustification { Val = TableRowAlignmentValues.Center };
t.Append(tableProps);
var row = new TableRow();
var rowProps = new TableRowProperties();
rowProps.Append(new TableJustification { Val = TableRowAlignmentValues.Center });
row.Append(rowProps);
Found using the Open XML Productivity Tool

Actually, you need to apply the center justification to all rows in TableRowProperties only. Even if you don't apply justification in TableProperties, the table will be centered anyway. And I'm interested to find out what is the purpose of justification in TableRowProperties if someone knows.