У меня есть файл .mdb с таблицей клиентов и таблицей агентов.Единственное, что еще делает таблица Агентов, - это заполнение раскрывающегося списка Агентов для каждого клиента ...
У меня есть DataGridView, связанный с customerBindingSource.Для customerBindingSource для DataMember задано значение Customer, а для DataSource - значение bindingSource1.Для этого источника данных установлено значение customerAppDS21.Если я выберу customerAppDS21 и нажму «Редактировать» в конструкторе DataSet, то смогу ясно увидеть, что есть таблица Customer и таблица Agent.Они были перетащены непосредственно из папки Data.mdf> Tables.Я прошел через мастер настройки и проверил, что команды Update, Insert и Delete сгенерированы правильно.
Я устанавливаю уникальный идентификатор (GUID), когда пользователь покидает строку или добавляет строку (я не думаю, чтооба необходимы, но я очень сомневаюсь, что это является причиной проблемы).Пользователь может обновить или добавить столько строк, сколько возможно.Когда пользователь нажимает кнопку Сохранить, он вызывает customerTableAdapter.Update(customerAppDS21.Customer);.Все события определенно связаны правильно.
Проблема в основном в том, что DataSet обновляется , но сама база данных не обновляется.Я могу закрыть программу и перезагрузить ее сразу, и данные там.Однако, если я внесу какие-либо изменения в код, а затем перекомпилирую и загрузлю программу, все данные исчезнут.Это то, что заставляет меня думать, что обновляется DataSet, но не база данных.
Кто-нибудь знает, как решить проблему?Я попытался добавить строку .acceptChanges(); как до, так и после строки .Update(bla);, но безуспешно.Я также пытался позвонить customerBindingSource.EndEdit(); и bindingSource1.EndEdit(); до линии .Update(bla);.
Любая помощь с этим будет принята с благодарностью.У меня была эта проблема в течение 2 дней, и я попробовал различные учебники, чтобы получить подсказку, где я ошибаюсь.
С уважением,
Ричард
Обновление: код ниже...
void button1_Click(object sender, EventArgs e)
{
Validate();
customerBindingSource.EndEdit();
customerTableAdapter.Update(customerAppDS21.Customer);
}
void grdCustomers_RowLeave(object sender, DataGridViewCellEventArgs e)
{
DataGridViewRow gvr = grdCustomers.Rows[e.RowIndex];
if (gvr.Cells[0].Value == null)
{
String g = Guid.NewGuid().ToString();
gvr.Cells[0].Value = g;
}
else
{
String currID = gvr.Cells[0].Value.ToString();
if (currID.Equals(""))
{
String g = Guid.NewGuid().ToString();
gvr.Cells[0].Value = g;
}
}
}
void grdCustomers_UserAddedRow(object sender, DataGridViewRowEventArgs e)
{
DataGridViewRow gvr = grdCustomers.Rows[grdCustomers.SelectedCells[0].RowIndex];
if (gvr.Cells[0].Value == null)
{
String g = Guid.NewGuid().ToString();
gvr.Cells[0].Value = g;
}
else
{
String currID = gvr.Cells[0].Value.ToString();
if (currID.Equals(""))
{
String g = Guid.NewGuid().ToString();
gvr.Cells[0].Value = g;
}
}
}
Дизайнерский код (извините, он так долго - я не хочу рисковать, пропуская что-нибудь жизненно важное):
namespace CustomerApp
{
partial class CustomerAppForm
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle1 = new System.Windows.Forms.DataGridViewCellStyle();
System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle2 = new System.Windows.Forms.DataGridViewCellStyle();
System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle3 = new System.Windows.Forms.DataGridViewCellStyle();
this.tabControl1 = new System.Windows.Forms.TabControl();
this.tabPage1 = new System.Windows.Forms.TabPage();
this.button1 = new System.Windows.Forms.Button();
this.grdCustomers = new System.Windows.Forms.DataGridView();
this.agentBindingSource = new System.Windows.Forms.BindingSource(this.components);
this.bindingSource1 = new System.Windows.Forms.BindingSource(this.components);
this.customerAppDS21 = new CustomerApp.CustomerAppDS2();
this.tabPage2 = new System.Windows.Forms.TabPage();
this.customerTableAdapter = new CustomerApp.CustomerAppDS2TableAdapters.CustomerTableAdapter();
this.agentTableAdapter = new CustomerApp.CustomerAppDS2TableAdapters.AgentTableAdapter();
this.customerBindingSource = new System.Windows.Forms.BindingSource(this.components);
this.idDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.companynameDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.contactforenameDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.contactsurnameDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.companyaddress1DataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.companyaddress2DataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.companytownDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.companycountyDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.companypostcodeDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.contacttelephoneDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.contactfaxDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.contactemailDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.agentIDDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewComboBoxColumn();
this.contactfullnameDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.tabControl1.SuspendLayout();
this.tabPage1.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.grdCustomers)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.agentBindingSource)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.bindingSource1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.customerAppDS21)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.customerBindingSource)).BeginInit();
this.SuspendLayout();
//
// tabControl1
//
this.tabControl1.Controls.Add(this.tabPage1);
this.tabControl1.Controls.Add(this.tabPage2);
this.tabControl1.Location = new System.Drawing.Point(12, 12);
this.tabControl1.Name = "tabControl1";
this.tabControl1.SelectedIndex = 0;
this.tabControl1.Size = new System.Drawing.Size(1000, 640);
this.tabControl1.TabIndex = 0;
//
// tabPage1
//
this.tabPage1.Controls.Add(this.button1);
this.tabPage1.Controls.Add(this.grdCustomers);
this.tabPage1.Location = new System.Drawing.Point(4, 22);
this.tabPage1.Name = "tabPage1";
this.tabPage1.Padding = new System.Windows.Forms.Padding(3);
this.tabPage1.Size = new System.Drawing.Size(992, 614);
this.tabPage1.TabIndex = 0;
this.tabPage1.Text = "Customers";
this.tabPage1.UseVisualStyleBackColor = true;
//
// button1
//
this.button1.Location = new System.Drawing.Point(882, 462);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 1;
this.button1.Text = "Save";
this.button1.UseVisualStyleBackColor = true;
//
// grdCustomers
//
this.grdCustomers.AllowUserToOrderColumns = true;
this.grdCustomers.AutoGenerateColumns = false;
dataGridViewCellStyle1.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
dataGridViewCellStyle1.BackColor = System.Drawing.SystemColors.Control;
dataGridViewCellStyle1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
dataGridViewCellStyle1.ForeColor = System.Drawing.SystemColors.WindowText;
dataGridViewCellStyle1.SelectionBackColor = System.Drawing.SystemColors.Highlight;
dataGridViewCellStyle1.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
dataGridViewCellStyle1.WrapMode = System.Windows.Forms.DataGridViewTriState.True;
this.grdCustomers.ColumnHeadersDefaultCellStyle = dataGridViewCellStyle1;
this.grdCustomers.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.grdCustomers.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.idDataGridViewTextBoxColumn,
this.companynameDataGridViewTextBoxColumn,
this.contactforenameDataGridViewTextBoxColumn,
this.contactsurnameDataGridViewTextBoxColumn,
this.companyaddress1DataGridViewTextBoxColumn,
this.companyaddress2DataGridViewTextBoxColumn,
this.companytownDataGridViewTextBoxColumn,
this.companycountyDataGridViewTextBoxColumn,
this.companypostcodeDataGridViewTextBoxColumn,
this.contacttelephoneDataGridViewTextBoxColumn,
this.contactfaxDataGridViewTextBoxColumn,
this.contactemailDataGridViewTextBoxColumn,
this.agentIDDataGridViewTextBoxColumn,
this.contactfullnameDataGridViewTextBoxColumn});
this.grdCustomers.DataSource = this.customerBindingSource;
dataGridViewCellStyle2.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
dataGridViewCellStyle2.BackColor = System.Drawing.SystemColors.Window;
dataGridViewCellStyle2.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
dataGridViewCellStyle2.ForeColor = System.Drawing.SystemColors.ControlText;
dataGridViewCellStyle2.SelectionBackColor = System.Drawing.SystemColors.Highlight;
dataGridViewCellStyle2.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
dataGridViewCellStyle2.WrapMode = System.Windows.Forms.DataGridViewTriState.False;
this.grdCustomers.DefaultCellStyle = dataGridViewCellStyle2;
this.grdCustomers.Location = new System.Drawing.Point(3, 3);
this.grdCustomers.Name = "grdCustomers";
dataGridViewCellStyle3.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
dataGridViewCellStyle3.BackColor = System.Drawing.SystemColors.Control;
dataGridViewCellStyle3.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
dataGridViewCellStyle3.ForeColor = System.Drawing.SystemColors.WindowText;
dataGridViewCellStyle3.SelectionBackColor = System.Drawing.SystemColors.Highlight;
dataGridViewCellStyle3.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
dataGridViewCellStyle3.WrapMode = System.Windows.Forms.DataGridViewTriState.True;
this.grdCustomers.RowHeadersDefaultCellStyle = dataGridViewCellStyle3;
this.grdCustomers.RowTemplate.DefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(255)))), ((int)(((byte)(192)))));
this.grdCustomers.RowTemplate.DefaultCellStyle.Padding = new System.Windows.Forms.Padding(2);
this.grdCustomers.RowTemplate.DefaultCellStyle.SelectionBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(224)))), ((int)(((byte)(192)))));
this.grdCustomers.Size = new System.Drawing.Size(983, 605);
this.grdCustomers.TabIndex = 0;
//
// agentBindingSource
//
this.agentBindingSource.DataMember = "Agent";
this.agentBindingSource.DataSource = this.bindingSource1;
//
// bindingSource1
//
this.bindingSource1.AllowNew = true;
this.bindingSource1.DataSource = this.customerAppDS21;
this.bindingSource1.Position = 0;
//
// customerAppDS21
//
this.customerAppDS21.DataSetName = "CustomerAppDS2";
this.customerAppDS21.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema;
//
// tabPage2
//
this.tabPage2.Location = new System.Drawing.Point(4, 22);
this.tabPage2.Name = "tabPage2";
this.tabPage2.Padding = new System.Windows.Forms.Padding(3);
this.tabPage2.Size = new System.Drawing.Size(992, 614);
this.tabPage2.TabIndex = 1;
this.tabPage2.Text = "Agents";
this.tabPage2.UseVisualStyleBackColor = true;
//
// customerTableAdapter
//
this.customerTableAdapter.ClearBeforeFill = true;
//
// agentTableAdapter
//
this.agentTableAdapter.ClearBeforeFill = true;
//
// customerBindingSource
//
this.customerBindingSource.DataMember = "Customer";
this.customerBindingSource.DataSource = this.bindingSource1;
//
// idDataGridViewTextBoxColumn
//
this.idDataGridViewTextBoxColumn.DataPropertyName = "id";
this.idDataGridViewTextBoxColumn.HeaderText = "id";
this.idDataGridViewTextBoxColumn.Name = "idDataGridViewTextBoxColumn";
this.idDataGridViewTextBoxColumn.ReadOnly = true;
//
// companynameDataGridViewTextBoxColumn
//
this.companynameDataGridViewTextBoxColumn.DataPropertyName = "company_name";
this.companynameDataGridViewTextBoxColumn.HeaderText = "Company Name";
this.companynameDataGridViewTextBoxColumn.Name = "companynameDataGridViewTextBoxColumn";
this.companynameDataGridViewTextBoxColumn.ToolTipText = "The name of the company";
//
// contactforenameDataGridViewTextBoxColumn
//
this.contactforenameDataGridViewTextBoxColumn.DataPropertyName = "contact_forename";
this.contactforenameDataGridViewTextBoxColumn.HeaderText = "Contact Forename";
this.contactforenameDataGridViewTextBoxColumn.Name = "contactforenameDataGridViewTextBoxColumn";
//
// contactsurnameDataGridViewTextBoxColumn
//
this.contactsurnameDataGridViewTextBoxColumn.DataPropertyName = "contact_surname";
this.contactsurnameDataGridViewTextBoxColumn.HeaderText = "Contact Surname";
this.contactsurnameDataGridViewTextBoxColumn.Name = "contactsurnameDataGridViewTextBoxColumn";
//
// companyaddress1DataGridViewTextBoxColumn
//
this.companyaddress1DataGridViewTextBoxColumn.DataPropertyName = "company_address1";
this.companyaddress1DataGridViewTextBoxColumn.HeaderText = "Address 1";
this.companyaddress1DataGridViewTextBoxColumn.Name = "companyaddress1DataGridViewTextBoxColumn";
//
// companyaddress2DataGridViewTextBoxColumn
//
this.companyaddress2DataGridViewTextBoxColumn.DataPropertyName = "company_address2";
this.companyaddress2DataGridViewTextBoxColumn.HeaderText = "Address 2";
this.companyaddress2DataGridViewTextBoxColumn.Name = "companyaddress2DataGridViewTextBoxColumn";
//
// companytownDataGridViewTextBoxColumn
//
this.companytownDataGridViewTextBoxColumn.DataPropertyName = "company_town";
this.companytownDataGridViewTextBoxColumn.HeaderText = "Town";
this.companytownDataGridViewTextBoxColumn.Name = "companytownDataGridViewTextBoxColumn";
//
// companycountyDataGridViewTextBoxColumn
//
this.companycountyDataGridViewTextBoxColumn.DataPropertyName = "company_county";
this.companycountyDataGridViewTextBoxColumn.HeaderText = "County";
this.companycountyDataGridViewTextBoxColumn.Name = "companycountyDataGridViewTextBoxColumn";
//
// companypostcodeDataGridViewTextBoxColumn
//
this.companypostcodeDataGridViewTextBoxColumn.DataPropertyName = "company_postcode";
this.companypostcodeDataGridViewTextBoxColumn.HeaderText = "Postcode";
this.companypostcodeDataGridViewTextBoxColumn.Name = "companypostcodeDataGridViewTextBoxColumn";
//
// contacttelephoneDataGridViewTextBoxColumn
//
this.contacttelephoneDataGridViewTextBoxColumn.DataPropertyName = "contact_telephone";
this.contacttelephoneDataGridViewTextBoxColumn.HeaderText = "Telephone";
this.contacttelephoneDataGridViewTextBoxColumn.Name = "contacttelephoneDataGridViewTextBoxColumn";
//
// contactfaxDataGridViewTextBoxColumn
//
this.contactfaxDataGridViewTextBoxColumn.DataPropertyName = "contact_fax";
this.contactfaxDataGridViewTextBoxColumn.HeaderText = "Fax";
this.contactfaxDataGridViewTextBoxColumn.Name = "contactfaxDataGridViewTextBoxColumn";
//
// contactemailDataGridViewTextBoxColumn
//
this.contactemailDataGridViewTextBoxColumn.DataPropertyName = "contact_email";
this.contactemailDataGridViewTextBoxColumn.HeaderText = "Email";
this.contactemailDataGridViewTextBoxColumn.Name = "contactemailDataGridViewTextBoxColumn";
//
// agentIDDataGridViewTextBoxColumn
//
this.agentIDDataGridViewTextBoxColumn.DataPropertyName = "agentID";
this.agentIDDataGridViewTextBoxColumn.DataSource = this.agentBindingSource;
this.agentIDDataGridViewTextBoxColumn.DisplayMember = "contact_fullname";
this.agentIDDataGridViewTextBoxColumn.HeaderText = "agentID";
this.agentIDDataGridViewTextBoxColumn.Name = "agentIDDataGridViewTextBoxColumn";
this.agentIDDataGridViewTextBoxColumn.Resizable = System.Windows.Forms.DataGridViewTriState.True;
this.agentIDDataGridViewTextBoxColumn.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic;
this.agentIDDataGridViewTextBoxColumn.ValueMember = "id";
//
// contactfullnameDataGridViewTextBoxColumn
//
this.contactfullnameDataGridViewTextBoxColumn.DataPropertyName = "contact_fullname";
this.contactfullnameDataGridViewTextBoxColumn.HeaderText = "contact_fullname";
this.contactfullnameDataGridViewTextBoxColumn.Name = "contactfullnameDataGridViewTextBoxColumn";
this.contactfullnameDataGridViewTextBoxColumn.ReadOnly = true;
this.contactfullnameDataGridViewTextBoxColumn.Visible = false;
//
// CustomerAppForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(1184, 662);
this.Controls.Add(this.tabControl1);
this.Location = new System.Drawing.Point(100, 100);
this.Name = "CustomerAppForm";
this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
this.Text = "Heritage Art Papers Ltd - Customer Application";
this.Load += new System.EventHandler(this.CustomerAppForm_Load);
this.tabControl1.ResumeLayout(false);
this.tabPage1.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.grdCustomers)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.agentBindingSource)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.bindingSource1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.customerAppDS21)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.customerBindingSource)).EndInit();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.TabControl tabControl1;
private System.Windows.Forms.TabPage tabPage1;
private System.Windows.Forms.TabPage tabPage2;
private System.Windows.Forms.BindingSource bindingSource1;
private CustomerAppDS2 customerAppDS21;
private System.Windows.Forms.BindingSource agentBindingSource;
private CustomerAppDS2TableAdapters.CustomerTableAdapter customerTableAdapter;
private CustomerAppDS2TableAdapters.AgentTableAdapter agentTableAdapter;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.BindingSource customerBindingSource;
private System.Windows.Forms.DataGridViewTextBoxColumn idDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn companynameDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn contactforenameDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn contactsurnameDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn companyaddress1DataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn companyaddress2DataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn companytownDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn companycountyDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn companypostcodeDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn contacttelephoneDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn contactfaxDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn contactemailDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewComboBoxColumn agentIDDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn contactfullnameDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridView grdCustomers;
}
}