我已经介绍了许多教程和文章，但找不到我需要帮助我解决问题的确切内容。
我的问题是我编译的dll不会将我的SQL数据库文件中的数据行返回到DataGridView。
我已将此项目创建为用于测试的Windows应用程序，并且工作正常。但是，当我将输出更改为类库时，它会运行，但不会向DataGridView返回任何数据。标题是存在的，因为它已声明，但我感觉编译后的dll无法建立与数据库的连接。
我有使用C＃和ASP的经验，但没有创建dll的经验。
为了进一步澄清，我可以在编译之前使用dataset或bindingsource并使用预览数据选项查看所有记录。在我的情况下创建类库时是否有特定的方法来设置数据库连接？
SQLDatabase.mdf连接字符串：
Data Source=(localdb)\v11.0;Initial Catalog=SQLDatabase.mdf;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False
Designer Generated Code：this.itemsTableAdapter.Fill（this.abDataSet.Items）;
如果您希望我发布作为Designer Generated Code的Form.Designer.cs，请告诉我。同样，一切都可以作为Windows应用程序运行，但作为类库，数据行永远不会显示在DataGridView中。
namespace AHPriceChecker4Free
{
public class AHPriceChecker : Core
{
private Thread formThread;
public void PluginStop()
{
Log("closed");
}
private AHCheckerForm ahForm;
public bool formIsOpen;
public void PluginRun()
{
formThread = new Thread(RunForm);
formThread.SetApartmentState(ApartmentState.STA);
formThread.Start();
formIsOpen = true;
while (formIsOpen)
{
Thread.Sleep(1000);
}
}
private void RunForm()
{
ahForm = new AHCheckerForm(this, me);
System.Windows.Forms.Application.Run(ahForm);
}
}
}
Form.cs
namespace AHPriceChecker4Free
{
partial class AHCheckerForm
{
/// <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.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(AHCheckerForm));
this.menuStrip1 = new System.Windows.Forms.MenuStrip();
this.tsmMain = new System.Windows.Forms.ToolStripMenuItem();
this.tsmLoad = new System.Windows.Forms.ToolStripMenuItem();
this.tsmSave = new System.Windows.Forms.ToolStripMenuItem();
this.txtItemName = new System.Windows.Forms.TextBox();
this.btnSearch = new System.Windows.Forms.Button();
this.ofdOpen = new System.Windows.Forms.OpenFileDialog();
this.sfdSave = new System.Windows.Forms.SaveFileDialog();
this.btnMassSearch = new System.Windows.Forms.Button();
this.itemPriceHistory = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.itemAveragePrice = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.itemLastPrice = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.itemName = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.dgvAuctionTable = new System.Windows.Forms.DataGridView();
this.tabControl1 = new System.Windows.Forms.TabControl();
this.tabPage1 = new System.Windows.Forms.TabPage();
this.tabPage2 = new System.Windows.Forms.TabPage();
this.label1 = new System.Windows.Forms.Label();
this.rtbSave = new System.Windows.Forms.RichTextBox();
this.tabPage3 = new System.Windows.Forms.TabPage();
this.label8 = new System.Windows.Forms.Label();
this.label7 = new System.Windows.Forms.Label();
this.label6 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.tabPage4 = new System.Windows.Forms.TabPage();
this.dataGridView1 = new System.Windows.Forms.DataGridView();
this.idDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.itemNameDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.goldDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.silverDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.copperDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.perQtyDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.abchristDataSet = new AHPriceChecker4Free.abchristDataSet();
this.itemsTableAdapter = new AHPriceChecker4Free.abchristDataSetTableAdapters.ItemsTableAdapter();
this.itemsBindingSource1 = new System.Windows.Forms.BindingSource(this.components);
this.menuStrip1.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.dgvAuctionTable)).BeginInit();
this.tabControl1.SuspendLayout();
this.tabPage1.SuspendLayout();
this.tabPage2.SuspendLayout();
this.tabPage3.SuspendLayout();
this.tabPage4.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.abchristDataSet)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.itemsBindingSource1)).BeginInit();
this.SuspendLayout();
//
// menuStrip1
//
this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.tsmMain});
this.menuStrip1.Location = new System.Drawing.Point(0, 0);
this.menuStrip1.Name = "menuStrip1";
this.menuStrip1.Padding = new System.Windows.Forms.Padding(7, 2, 0, 2);
this.menuStrip1.Size = new System.Drawing.Size(819, 24);
this.menuStrip1.TabIndex = 0;
this.menuStrip1.Text = "menuStrip1";
this.menuStrip1.ItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.menuStrip1_ItemClicked);
//
// tsmMain
//
this.tsmMain.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.tsmLoad,
this.tsmSave});
this.tsmMain.Name = "tsmMain";
this.tsmMain.Size = new System.Drawing.Size(41, 20);
this.tsmMain.Text = "&Main";
//
// tsmLoad
//
this.tsmLoad.Name = "tsmLoad";
this.tsmLoad.Size = new System.Drawing.Size(123, 22);
this.tsmLoad.Text = "&Load data";
this.tsmLoad.Click += new System.EventHandler(this.tsmLoad_Click);
//
// tsmSave
//
this.tsmSave.Name = "tsmSave";
this.tsmSave.Size = new System.Drawing.Size(123, 22);
this.tsmSave.Text = "&Save data";
this.tsmSave.Click += new System.EventHandler(this.transferDataToSave);
//
// txtItemName
//
this.txtItemName.BackColor = System.Drawing.Color.LightYellow;
this.txtItemName.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.txtItemName.Location = new System.Drawing.Point(8, 353);
this.txtItemName.Name = "txtItemName";
this.txtItemName.Size = new System.Drawing.Size(203, 20);
this.txtItemName.TabIndex = 2;
//
// btnSearch
//
this.btnSearch.BackColor = System.Drawing.Color.LightYellow;
this.btnSearch.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.btnSearch.Location = new System.Drawing.Point(217, 351);
this.btnSearch.Name = "btnSearch";
this.btnSearch.Size = new System.Drawing.Size(87, 25);
this.btnSearch.TabIndex = 5;
this.btnSearch.Text = "Search";
this.btnSearch.UseVisualStyleBackColor = false;
this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
//
// ofdOpen
//
this.ofdOpen.FileName = "openFileDialog1";
//
// sfdSave
//
this.sfdSave.FileOk += new System.ComponentModel.CancelEventHandler(this.sfdSave_FileOk);
//
// btnMassSearch
//
this.btnMassSearch.BackColor = System.Drawing.Color.LightYellow;
this.btnMassSearch.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.btnMassSearch.Location = new System.Drawing.Point(310, 351);
this.btnMassSearch.Name = "btnMassSearch";
this.btnMassSearch.Size = new System.Drawing.Size(105, 25);
this.btnMassSearch.TabIndex = 8;
this.btnMassSearch.Text = "Mass search";
this.btnMassSearch.UseVisualStyleBackColor = false;
this.btnMassSearch.Click += new System.EventHandler(this.btnMassSearch_Click);
//
// itemPriceHistory
//
this.itemPriceHistory.HeaderText = "Price History";
this.itemPriceHistory.Name = "itemPriceHistory";
this.itemPriceHistory.ReadOnly = true;
this.itemPriceHistory.Width = 350;
//
// itemAveragePrice
//
this.itemAveragePrice.HeaderText = "Average price";
this.itemAveragePrice.Name = "itemAveragePrice";
this.itemAveragePrice.ReadOnly = true;
this.itemAveragePrice.Width = 110;
//
// itemLastPrice
//
this.itemLastPrice.HeaderText = "Last price";
this.itemLastPrice.Name = "itemLastPrice";
//
// itemName
//
this.itemName.Frozen = true;
this.itemName.HeaderText = "Name";
this.itemName.Name = "itemName";
this.itemName.ReadOnly = true;
this.itemName.Width = 200;
//
// dgvAuctionTable
//
this.dgvAuctionTable.BackgroundColor = System.Drawing.Color.Cornsilk;
this.dgvAuctionTable.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dgvAuctionTable.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.itemName,
this.itemLastPrice,
this.itemAveragePrice,
this.itemPriceHistory});
this.dgvAuctionTable.Dock = System.Windows.Forms.DockStyle.Top;
this.dgvAuctionTable.Location = new System.Drawing.Point(3, 3);
this.dgvAuctionTable.Name = "dgvAuctionTable";
this.dgvAuctionTable.RowHeadersVisible = false;
this.dgvAuctionTable.Size = new System.Drawing.Size(805, 342);
this.dgvAuctionTable.TabIndex = 1;
this.dgvAuctionTable.CurrentCellDirtyStateChanged += new System.EventHandler(this.dgvAuctionTable_CurrentCellDirtyStateChanged);
//
**// *** REMOVED ALL TABS BUT THE ONE I AM HAVING AN ISSUE WITH TO REDUCE SIZE. THIS FORM BODY IS LIMITED TO 30000 CHARACTERS WHEN POSTING *** //
//**
// tabPage4
//
this.tabPage4.Controls.Add(this.dataGridView1);
this.tabPage4.Location = new System.Drawing.Point(4, 23);
this.tabPage4.Name = "tabPage4";
this.tabPage4.Padding = new System.Windows.Forms.Padding(3);
this.tabPage4.Size = new System.Drawing.Size(811, 381);
this.tabPage4.TabIndex = 3;
this.tabPage4.Text = "Database";
this.tabPage4.UseVisualStyleBackColor = true;
//
// dataGridView1
//
this.dataGridView1.AllowUserToAddRows = false;
this.dataGridView1.AllowUserToDeleteRows = false;
this.dataGridView1.AutoGenerateColumns = false;
this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.idDataGridViewTextBoxColumn,
this.itemNameDataGridViewTextBoxColumn,
this.goldDataGridViewTextBoxColumn,
this.silverDataGridViewTextBoxColumn,
this.copperDataGridViewTextBoxColumn,
this.perQtyDataGridViewTextBoxColumn});
this.dataGridView1.DataSource = this.itemsBindingSource1;
this.dataGridView1.Location = new System.Drawing.Point(66, 69);
this.dataGridView1.Name = "dataGridView1";
this.dataGridView1.ReadOnly = true;
this.dataGridView1.RowHeadersVisible = false;
this.dataGridView1.Size = new System.Drawing.Size(669, 194);
this.dataGridView1.TabIndex = 0;
//
// idDataGridViewTextBoxColumn
//
this.idDataGridViewTextBoxColumn.DataPropertyName = "Id";
this.idDataGridViewTextBoxColumn.HeaderText = "Id";
this.idDataGridViewTextBoxColumn.Name = "idDataGridViewTextBoxColumn";
this.idDataGridViewTextBoxColumn.ReadOnly = true;
//
// itemNameDataGridViewTextBoxColumn
//
this.itemNameDataGridViewTextBoxColumn.DataPropertyName = "ItemName";
this.itemNameDataGridViewTextBoxColumn.HeaderText = "ItemName";
this.itemNameDataGridViewTextBoxColumn.Name = "itemNameDataGridViewTextBoxColumn";
this.itemNameDataGridViewTextBoxColumn.ReadOnly = true;
//
// goldDataGridViewTextBoxColumn
//
this.goldDataGridViewTextBoxColumn.DataPropertyName = "Gold";
this.goldDataGridViewTextBoxColumn.HeaderText = "Gold";
this.goldDataGridViewTextBoxColumn.Name = "goldDataGridViewTextBoxColumn";
this.goldDataGridViewTextBoxColumn.ReadOnly = true;
//
// silverDataGridViewTextBoxColumn
//
this.silverDataGridViewTextBoxColumn.DataPropertyName = "Silver";
this.silverDataGridViewTextBoxColumn.HeaderText = "Silver";
this.silverDataGridViewTextBoxColumn.Name = "silverDataGridViewTextBoxColumn";
this.silverDataGridViewTextBoxColumn.ReadOnly = true;
//
// copperDataGridViewTextBoxColumn
//
this.copperDataGridViewTextBoxColumn.DataPropertyName = "Copper";
this.copperDataGridViewTextBoxColumn.HeaderText = "Copper";
this.copperDataGridViewTextBoxColumn.Name = "copperDataGridViewTextBoxColumn";
this.copperDataGridViewTextBoxColumn.ReadOnly = true;
//
// perQtyDataGridViewTextBoxColumn
//
this.perQtyDataGridViewTextBoxColumn.DataPropertyName = "PerQty";
this.perQtyDataGridViewTextBoxColumn.HeaderText = "PerQty";
this.perQtyDataGridViewTextBoxColumn.Name = "perQtyDataGridViewTextBoxColumn";
this.perQtyDataGridViewTextBoxColumn.ReadOnly = true;
//
// abchristDataSet
//
this.abchristDataSet.DataSetName = "abchristDataSet";
this.abchristDataSet.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema;
//
// itemsTableAdapter
//
this.itemsTableAdapter.ClearBeforeFill = true;
//
// itemsBindingSource1
//
this.itemsBindingSource1.DataMember = "Items";
this.itemsBindingSource1.DataSource = this.abchristDataSet;
//
// AHCheckerForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 14F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.BackColor = System.Drawing.Color.Cornsilk;
this.ClientSize = new System.Drawing.Size(819, 432);
this.Controls.Add(this.tabControl1);
this.Controls.Add(this.menuStrip1);
this.Font = new System.Drawing.Font("Arial", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.MainMenuStrip = this.menuStrip1;
this.Name = "AHCheckerForm";
this.Text = "AHPriceChecker4Free - By Cobras.Club";
this.TopMost = true;
this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.AHCheckerForm_FormClosed);
this.Load += new System.EventHandler(this.AHCheckerForm_Load);
this.menuStrip1.ResumeLayout(false);
this.menuStrip1.PerformLayout();
((System.ComponentModel.ISupportInitialize)(this.dgvAuctionTable)).EndInit();
this.tabControl1.ResumeLayout(false);
this.tabPage1.ResumeLayout(false);
this.tabPage1.PerformLayout();
this.tabPage2.ResumeLayout(false);
this.tabPage2.PerformLayout();
this.tabPage3.ResumeLayout(false);
this.tabPage3.PerformLayout();
this.tabPage4.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.abchristDataSet)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.itemsBindingSource1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.MenuStrip menuStrip1;
private System.Windows.Forms.ToolStripMenuItem tsmMain;
private System.Windows.Forms.ToolStripMenuItem tsmLoad;
private System.Windows.Forms.TextBox txtItemName;
private System.Windows.Forms.Button btnSearch;
private System.Windows.Forms.OpenFileDialog ofdOpen;
private System.Windows.Forms.SaveFileDialog sfdSave;
private System.Windows.Forms.Button btnMassSearch;
private System.Windows.Forms.ToolStripMenuItem tsmSave;
private System.Windows.Forms.DataGridViewTextBoxColumn itemPriceHistory;
private System.Windows.Forms.DataGridViewTextBoxColumn itemAveragePrice;
private System.Windows.Forms.DataGridViewTextBoxColumn itemLastPrice;
private System.Windows.Forms.DataGridViewTextBoxColumn itemName;
private System.Windows.Forms.DataGridView dgvAuctionTable;
private System.Windows.Forms.TabControl tabControl1;
private System.Windows.Forms.TabPage tabPage1;
private System.Windows.Forms.TabPage tabPage2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.RichTextBox rtbSave;
private System.Windows.Forms.TabPage tabPage3;
private System.Windows.Forms.Label label8;
private System.Windows.Forms.Label label7;
private System.Windows.Forms.Label label6;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TabPage tabPage4;
private System.Windows.Forms.DataGridView dataGridView1;
private abchristDataSet abchristDataSet;
private abchristDataSetTableAdapters.ItemsTableAdapter itemsTableAdapter;
private System.Windows.Forms.DataGridViewTextBoxColumn idDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn itemNameDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn goldDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn silverDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn copperDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn perQtyDataGridViewTextBoxColumn;
private System.Windows.Forms.BindingSource itemsBindingSource1;
}
}
答案 0 :(得分：0)
您必须在类库中添加代码才能设置连接字符串。设置连接字符串的位置在类库的构造函数中。您可以在app.config中手动添加这样的连接字符串：
<connectionStrings>
<add name="MyDB" connectionString="Server=.\SQLExpress;
AttachDbFilename=C:\MyFolder\MyDataFile.mdf;Database=dbname;
Trusted_Connection=Yes;" />
</connectionStrings>
然后访问配置字符串，如下所示：
var str = ConfigurationManager.ConnectionStrings["MyDb"].ConnectionString