我正在尝试在c＃中打印gridview数据。但我有错误 指数超出范围。必须是非负数且小于集合的大小
我的代码示例是
//将数据加载到网格视图
private void Form_Load(object sender, EventArgs e)
{
DBConnection db = new DBConnection();
db.cnTransact.Open();
SqlCommand cm;
try
{
string catName = "Single Gas Clip Personal Monitor (SGC)";
string sql = "SELECT item_id, noun, category, type, partNo from tbl_items where category='"+catName+"' ";
cm = new SqlCommand(sql, db.cnTransact);
SqlDataReader sqlReader = cm.ExecuteReader();
while (sqlReader.Read())
{
object[] row = { sqlReader[0], sqlReader[1], sqlReader[2], sqlReader[3], sqlReader[4] };
dataGridView1.Rows.Add(row);
// grd_singlgasmonitor.Rows.Add(row);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
打印按钮代码
private void button1_Click(object sender, EventArgs e)
{
PrintDialog printDialog = new PrintDialog();
printDialog.Document = printDocument1;
printDialog.UseEXDialog = true;
//Get the document
if (DialogResult.OK == printDialog.ShowDialog())
{
printDocument1.DocumentName = "Test Page Print";
printDocument1.Print();
}
}
打印活动代码
private void printDocument1_BeginPrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
try
{
strFormat = new StringFormat();
strFormat.Alignment = StringAlignment.Near;
strFormat.LineAlignment = StringAlignment.Center;
strFormat.Trimming = StringTrimming.EllipsisCharacter;
arrColumnLefts.Clear();
arrColumnWidths.Clear();
iCellHeight = 0;
iRow = 0;
bFirstPage = true;
bNewPage = true;
// Calculating Total Widths
iTotalWidth = 0;
foreach (DataGridViewColumn dgvGridCol in dataGridView1.Columns)
{
iTotalWidth += dgvGridCol.Width;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
和
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
try
{
//Set the left margin
int iLeftMargin = e.MarginBounds.Left;
//Set the top margin
int iTopMargin = e.MarginBounds.Top;
//Whether more pages have to print or not
bool bMorePagesToPrint = false;
int iTmpWidth = 0;
//For the first page to print set the cell width and header height
if (bFirstPage)
{
foreach (DataGridViewColumn GridCol in dataGridView1.Columns)
{
iTmpWidth = (int)(Math.Floor((double)((double)GridCol.Width /
(double)iTotalWidth * (double)iTotalWidth *
((double)e.MarginBounds.Width / (double)iTotalWidth))));
iHeaderHeight = (int)(e.Graphics.MeasureString(GridCol.HeaderText,
GridCol.InheritedStyle.Font, iTmpWidth).Height) + 11;
// Save width and height of headres
arrColumnLefts.Add(iLeftMargin);
arrColumnWidths.Add(iTmpWidth);
iLeftMargin += iTmpWidth;
}
}
//Loop till all the grid rows not get printed
while (iRow <= dataGridView1.Rows.Count - 1)
{
DataGridViewRow GridRow = dataGridView1.Rows[iRow];
//Set the cell height
iCellHeight = GridRow.Height + 5;
int iCount = 0;
//Check whether the current page settings allo more rows to print
if (iTopMargin + iCellHeight >= e.MarginBounds.Height + e.MarginBounds.Top)
{
bNewPage = true;
bFirstPage = false;
bMorePagesToPrint = true;
break;
}
else
{
if (bNewPage)
{
//Draw Header
e.Graphics.DrawString("Customer Summary", new Font(dataGridView1.Font, FontStyle.Bold),
Brushes.Black, e.MarginBounds.Left, e.MarginBounds.Top -
e.Graphics.MeasureString("Customer Summary", new Font(dataGridView1.Font,
FontStyle.Bold), e.MarginBounds.Width).Height - 13);
String strDate = DateTime.Now.ToLongDateString() + " " + DateTime.Now.ToShortTimeString();
//Draw Date
e.Graphics.DrawString(strDate, new Font(dataGridView1.Font, FontStyle.Bold),
Brushes.Black, e.MarginBounds.Left + (e.MarginBounds.Width -
e.Graphics.MeasureString(strDate, new Font(dataGridView1.Font,
FontStyle.Bold), e.MarginBounds.Width).Width), e.MarginBounds.Top -
e.Graphics.MeasureString("Customer Summary", new Font(new Font(dataGridView1.Font,
FontStyle.Bold), FontStyle.Bold), e.MarginBounds.Width).Height - 13);
//Draw Columns
iTopMargin = e.MarginBounds.Top;
foreach (DataGridViewColumn GridCol in dataGridView1.Columns)
{
e.Graphics.FillRectangle(new SolidBrush(Color.LightGray),
new Rectangle((int)arrColumnLefts[iCount], iTopMargin,
(int)arrColumnWidths[iCount], iHeaderHeight));
e.Graphics.DrawRectangle(Pens.Black,
new Rectangle((int)arrColumnLefts[iCount], iTopMargin,
(int)arrColumnWidths[iCount], iHeaderHeight));
e.Graphics.DrawString(GridCol.HeaderText, GridCol.InheritedStyle.Font,
new SolidBrush(GridCol.InheritedStyle.ForeColor),
new RectangleF((int)arrColumnLefts[iCount], iTopMargin,
(int)arrColumnWidths[iCount], iHeaderHeight), strFormat);
iCount++;
}
bNewPage = false;
iTopMargin += iHeaderHeight;
}
iCount = 0;
//Draw Columns Contents
foreach (DataGridViewCell Cel in GridRow.Cells)
{
if (Cel.Value != null)
{
e.Graphics.DrawString(Cel.Value.ToString(), Cel.InheritedStyle.Font,
new SolidBrush(Cel.InheritedStyle.ForeColor),
new RectangleF((int)arrColumnLefts[iCount],(float)iTopMargin,
(int)arrColumnWidths[iCount], (float)iCellHeight), strFormat);
}
//Drawing Cells Borders
e.Graphics.DrawRectangle(Pens.Black, new Rectangle((int)arrColumnLefts[iCount],
iTopMargin, (int)arrColumnWidths[iCount], iCellHeight));
iCount++;
}
}
iRow++;
iTopMargin += iCellHeight;
}
//If more lines exist, print another page.
if (bMorePagesToPrint)
e.HasMorePages = true;
else
e.HasMorePages = false;
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
我在线上有错误
e.Graphics.DrawString(Cel.Value.ToString(), Cel.InheritedStyle.Font,
new SolidBrush(Cel.InheritedStyle.ForeColor),
new RectangleF((int)arrColumnLefts[iCount],(float)iTopMargin,
(int)arrColumnWidths[iCount], (float)iCellHeight), strFormat);
编译器/ IDE没有获得（int）arrColumnLefts [iCount]的值，我试过调试。它在arrColumLefts [iCount]
中显示Null值请告诉我如何解决这个问题
由于 萨吉德
答案 0 :(得分：0)