你好,我正在学习使用C# VS 2010 EE进行编程,并制作一个填写预印表格的应用程序。该表格在不同坐标上有几个位置。纸张上的三个方框都是多行的,尺寸为5“ W x 2” H。
我已经创建了具有每个纸质表格位置的一个TextBox
的窗体。
问题在于,在这些多行TextBoxes中输入信息时,我需要知道纸张上还有多少行可以输入更多文本,以及何时停止输入,因为预印的方框没有更多空间可用。
我已经做了很多搜索,但所有我找到的内容都是关于在屏幕上测量,这与最终结果不符合。
换言之,我需要知道如何找出文本在TextBoxes中被键入时在纸上的字符串尺寸,然后将其与可用于预印表格中的空间进行比较,以便在超过纸上方框的底部边界之前停止。
纸上的第一个方框宽度为5“,高度为2”,从“new RectangleF(60.0F, 200.0F, 560.0F, 200.0F)
”开始。我理解这些数字是英寸的百分之一。
所有这些,考虑到我不能通过字符数量限制TextBoxes,因为不是所有字符占用相同的空间,例如H != I;
M != l;
等等。
提前感谢你的帮助。根据您的评论和建议,在今天的2011年9月5日,我已经更改了代码以使用Graphics.MeasureString。
这是我现在拥有的具有Graphics.MeasureString和一个richTextBox的代码: 从printDocument1_PrintPage事件中工作得很完美。但我不知道如何使它从richTextBox1_TextChanged事件中工作。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Printing;//Needed for the PrintDocument()
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Printing
{
public partial class Form1 : Form
{
private Font printFont1;
string strPrintText;
public Form1()
{
InitializeComponent();
}
private void cmdPrint_Click(object sender, EventArgs e)
{
try
{
PrintDocument pdocument = new PrintDocument();
pdocument.PrintPage += new PrintPageEventHandler
(this.printDocument1_PrintPage);
pdocument.Print();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public void printDocument1_PrintPage (object sender,
System.Drawing.Printing.PrintPageEventArgs e)
{
strPrintText = richTextBox1.Text.ToString();
printFont1 = new Font("Times New Roman", 10); //I had to remove this line from the btnPrintAnexo1_Click
Graphics g = e.Graphics;
StringFormat format1 = new StringFormat();
RectangleF rectfText;
int iCharactersFitted, iLinesFitted;
rectfText = new RectangleF(60.0F, 200.0F, 560.0F, 200.0F);
// The following e.Graphics.DrawRectangle is
// just for debuging with printpreview
e.Graphics.DrawRectangle(new Pen(Color.Black, 1F),
rectfText.X, rectfText.Y, rectfText.Width, rectfText.Height);
format1.Trimming = StringTrimming.Word; //Word wrapping
//The next line of code "StringFormatFlags.LineLimit" was commented so the condition "iLinesFitted > 12" could be taken into account by the MessageBox
// Use next line of code if you don't want to show last line, which will be clipped, in rectangleF
//format1.FormatFlags = StringFormatFlags.LineLimit;
//Don't use this next line of code. Some how it gave me a wrong linesFilled
//g.MeasureString(strPrintText, font, rectfFull.Size,
//StringFormat.GenericTypographic, out iCharactersFitted, out iLinesFilled);
//Use this one instead:
//Here is where we get the quantity of characters and lines used
g.MeasureString(strPrintText, printFont1, rectfText.Size, format1, out iCharactersFitted, out iLinesFitted);
if (strPrintText.Length == 0)
{
e.Cancel = true;
return;
}
if (iLinesFitted > 12)
{
MessageBox.Show("Too many lines in richTextBox1.\nPlease reduce text entered.");
e.Cancel = true;
return;
}
g.DrawString(strPrintText, printFont1, Brushes.Black, rectfText, format1);
g.DrawString("iLinesFilled = Lines in the rectangle: " + iLinesFitted.ToString(), printFont1, Brushes.Black,
rectfText.X, rectfText.Height + rectfText.Y);
g.DrawString("iCharactersFitted = Characters in the rectangle: " + iCharactersFitted.ToString(), printFont1, Brushes.Black,
rectfText.X, rectfText.Height + rectfText.Y + printFont1.Height);
}
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
//***I don’t know what to type here.***
if (iLinesFitted == 13)
{
MessageBox.Show("Too many lines in richTextBox1.\nPlease erase some characters.");
}
}
private void cmdPrintPreview_Click(object sender, EventArgs e)
{
printPreviewDialog1.ShowDialog();
}
private void printDocument1_BeginPrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
// strPrintText = richTextBox1.Text;
}
}
}