数据网格视图索引错误。指数超出范围。必须是非负且小于集合的大小。 [英] Data grid view index error. index was out of range. must be nonnegative and less than the size of the collection.
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问题描述
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace AQUASURE
{
public partial class customerdetails : Form
{
const string strConnectionString = @"Integrated Security=SSPI;Initial Catalog=newstock;Data Source=USER-PC\SQLEXPRESS";
StringFormat strFormat; //Used to format the grid rows.
ArrayList arrColumnLefts = new ArrayList();//Used to save left coordinates of columns
ArrayList arrColumnWidths = new ArrayList();//Used to save column widths
int iCellHeight = 0; //Used to get/set the datagridview cell height
int iTotalWidth = 0; //
int iRow = 0;//Used as counter
bool bFirstPage = false; //Used to check whether we are printing first page
bool bNewPage = false;// Used to check whether we are printing a new page
int iHeaderHeight = 0; //Used for the header height
public customerdetails()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Cursor.Current = Cursors.WaitCursor;
SqlConnection sqlConnection = null;
SqlCommand sqlCommand = null;
SqlDataReader sqlReader = null;
try
{
string strQuery = "SELECT * FROM client";
sqlConnection = new SqlConnection(strConnectionString);
sqlConnection.Open();
sqlCommand = new SqlCommand(strQuery, sqlConnection);
sqlReader = sqlCommand.ExecuteReader();
while (sqlReader.Read())
{
object[] row = { sqlReader[0], sqlReader[1], sqlReader[2], sqlReader[3], sqlReader[4], sqlReader[5], sqlReader[6], sqlReader[7] };
dataGridView1.Rows.Add(row);
}
sqlConnection.Close();
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
finally
{
Cursor.Current = Cursors.Default;
if (sqlReader != null)
{
sqlReader.Dispose();
sqlReader = null;
}
if (sqlCommand != null)
{
sqlCommand.Dispose();
sqlCommand = null;
}
}
}
private void button2_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();
}
}
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);
}
}
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);
}
}
}
}
here whenever i am clicking on print button its showing a message with the error message.
what is the mistake???
please help me..
thanx in advance...
推荐答案
当你试图访问不包含记录的网格视图数据时会发生这种情况。
无论你在哪里使用网格，检查它是否有行。
对于ex ：您正在访问for循环中的网格单元格。所以在for循环之前使用这样的条件。
This is happening when u r trying to access the grid view data which contains no records.
Wherever you are using the grid, check if it is having rows.
For ex: You are accessing the grid cells in for loop. so before for loop use a condition like this.
if(DataGridViewCell.Rows.Count >0)
{
For()
}
这意味着什么？在我的代码中有任何问题
这意味着您正在访问集合中不存在的位置或索引。
要查找这一点，确保您的Gridview有5列，因为您正在使用它的第5列。
dataGridView1.Columns [4] .Name =Amount;
这是显示数组元素的图像。因此，如果您的gridview有较少的列，然后是您访问它的（index + 1），则会出现此异常。
在此处输入图像描述
what this means ? is there any problem in my code
It means that you are accessing a location or index which is not present in collection.
To find this, Make sure your Gridview has 5 columns as you are using it's 5th column by this line
dataGridView1.Columns[4].Name = "Amount";
Here is the image which shows the elements of an array. So if your gridview has less column then the (index + 1) by which you are accessing it, then this exception arises.
enter image description here
这是你的代码：
This is your code:
while (sqlReader.Read())
{
object[] row = { sqlReader[0], sqlReader[1], sqlReader[2], sqlReader[3], sqlReader[4], sqlReader[5], sqlReader[6], sqlReader[7] };
dataGridView1.Rows.Add(row);
}
请在条件允许的情况下删除。
输入：
datagridview1.datasource = sqlreader;
然后编辑网格模板以仅显示选定的列
Please Remove while condition.
enter:
datagridview1.datasource=sqlreader;
then edit grid template to show only selected columns
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